Despite the aura of omnipotence most empires  project, a look at their history should remind us that they are fragile  organisms. So delicate is their ecology of power that, when things start to go  truly bad, empires regularly unravel with unholy speed: just a year for  Portugal, two years for the Soviet Union, eight years for France, 11 years for  the Ottomans, 17 years for Great Britain, and, in all likelihood, 22 years for  the United States, counting from the crucial year 2003.
 Future historians are  likely to identify the Bush administration's rash invasion of Iraq in that year  as the start of America's downfall. However, instead of the bloodshed that  marked the end of so many past empires, with cities burning and civilians  slaughtered, this twenty-first century imperial collapse could come relatively  quietly through the invisible tendrils of economic collapse or  cyberwarfare.
 But have no doubt: when Washington's global  dominion finally ends, there will be painful daily reminders of what such a loss  of power means for Americans in every walk of life. As a half-dozen European  nations have discovered, imperial decline tends to have a remarkably  demoralizing impact on a society, regularly bringing at least a generation of  economic privation. As the economy cools, political temperatures rise, often  sparking serious domestic unrest.
 Available economic, educational, and military  data indicate that, when it comes to US global power, negative trends will  aggregate rapidly by 2020 and are likely to reach a critical mass no later than  2030. The American Century, proclaimed so triumphantly at the start of World War  II, will be tattered and fading by 2025, its eighth decade, and could be history  by 2030.
 Significantly, in 2008, the US National  Intelligence Council admitted for the first time that America's global power was  indeed on a declining trajectory. In one of its periodic futuristic reports, Global Trends 2025, the  Council cited "the transfer of global wealth and economic  power now under way, roughly from West to East" and "without  precedent in modern history," as the primary factor in the decline of the  "United States' relative strength—even in the military realm." Like many in  Washington, however, the Council's analysts anticipated a very long, very soft  landing for American global preeminence, and harbored the hope that somehow the  US would long "retain unique military capabilities… to project military power  globally" for decades to come.
 No such luck.  Under current projections,  the United States will find itself in second place behind China (already the  world's second largest economy) in economic output around 2026, and behind India  by 2050. Similarly, Chinese innovation is on a trajectory toward world  leadership in applied science and military technology sometime between 2020 and  2030, just as America's current supply of brilliant scientists and engineers  retires, without adequate replacement by an ill-educated younger  generation.
 By 2020, according to current plans, the  Pentagon will throw a military Hail Mary pass for a dying empire.  It will  launch a lethal triple canopy of advanced aerospace robotics that represents  Washington's last best hope of retaining global power despite its waning  economic influence. By that year, however, China's global network of  communications satellites, backed by the world's most powerful supercomputers,  will also be fully operational, providing Beijing with an independent platform  for the weaponization of space and a powerful communications system for missile-  or cyber-strikes into every quadrant of the globe.
 Wrapped in imperial hubris, like Whitehall or  Quai d'Orsay before it, the White House still seems to imagine that American  decline will be gradual, gentle, and partial. In his State of the Union address  last January, President Obama offered the reassurance that "I do not accept second place for  the United States of America." A few days later, Vice President Biden ridiculed the very idea that "we are destined to fulfill  [historian Paul] Kennedy's prophecy that we are going to be a great nation that  has failed because we lost control of our economy and overextended." Similarly,  writing in the November issue of the establishment journal Foreign  Affairs, neo-liberal foreign policy guru Joseph Nye waved away talk of China's economic and military rise,  dismissing "misleading metaphors of organic decline" and denying that any  deterioration in US global power was underway.
 Ordinary Americans, watching their jobs head  overseas, have a more realistic view than their cosseted leaders. An opinion  poll in August 2010 found that 65% of Americans believed the country was now "in a  state of decline."  Already, Australia and Turkey, traditional US military allies, are using their  American-manufactured weapons for joint air and naval maneuvers with China.  Already, America's closest economic partners are backing away from Washington's  opposition to China's rigged currency rates. As the president flew back from his  Asian tour last month, a gloomy New York Times headline   summed the moment up this way: "Obama's Economic View Is  Rejected on World Stage, China, Britain and Germany Challenge US, Trade Talks  With Seoul Fail, Too."
 Viewed historically, the question is not whether  the United States will lose its unchallenged global power, but just how  precipitous and wrenching the decline will be. In place of Washington's wishful  thinking, let's use the National Intelligence Council's own futuristic  methodology to suggest four realistic scenarios for how, whether with a bang or  a whimper, US global power could reach its end in the 2020s (along with four  accompanying assessments of just where we are today).  The future scenarios  include: economic decline, oil shock, military misadventure, and World War  III.  While these are hardly the only possibilities when it comes to  American decline or even collapse, they offer a window into an onrushing  future.
 Economic Decline: Present  Situation
 Today, three main threats exist to America's  dominant position in the global economy: loss of economic clout thanks to a  shrinking share of world trade, the decline of American technological  innovation, and the end of the dollar's privileged status as the global reserve  currency.
 By 2008, the United States had already fallen to number three in global merchandise exports, with  just 11% of them compared to 12% for China and 16% for the European Union.   There is no reason to believe that this trend will reverse itself.
 Similarly, American leadership in technological  innovation is on the wane. In 2008, the US was still number  two behind Japan in worldwide patent applications with 232,000, but China  was closing fast at 195,000, thanks to a blistering 400% increase since  2000.  A harbinger of further decline: in 2009 the US hit rock bottom in  ranking among the 40 nations surveyed by the Information Technology & Innovation  Foundation when it came to "change" in "global innovation-based competitiveness"  during the previous decade.  Adding substance to these statistics, in  October China's Defense Ministry unveiled the world's fastest supercomputer, the  Tianhe-1A, so powerful, said one US expert, that it "blows away the existing No. 1  machine" in America.
 Add to this clear evidence that the US education  system, that source of future scientists and innovators, has been falling behind  its competitors. After leading the world for decades in 25- to 34-year-olds with  university degrees, the country sank to 12th place in 2010.  The World Economic Forum ranked the United States at a mediocre 52nd among 139 nations  in the quality of its university math and science instruction in 2010. Nearly  half of all graduate students in the sciences in the US are now foreigners, most  of whom will be heading home, not staying here as once would have  happened.  By 2025, in other words, the United States is likely to face a  critical shortage of talented scientists.
 Such negative trends are encouraging  increasingly sharp criticism of the dollar's role as the world's reserve  currency. "Other countries are no longer willing to buy into the idea that the  US knows best on economic policy," observed Kenneth S. Rogoff, a former chief economist at the  International Monetary Fund. In mid-2009, with the world's central banks holding  an astronomical $4 trillion in US Treasury notes, Russian president Dimitri  Medvedev insisted that it was time to end "the artificially maintained  unipolar system" based on "one formerly strong reserve currency."
 Simultaneously, China's central bank governor suggested that the future might lie with a global reserve  currency "disconnected from individual nations" (that is, the US dollar). Take  these as signposts of a world to come, and of a possible attempt, as economist  Michael Hudson has argued, "to hasten the bankruptcy of the US  financial-military world order."
 Economic Decline: Scenario  2020
 After years of swelling deficits fed by  incessant warfare in distant lands, in 2020, as long expected, the US dollar  finally loses its special status as the world's reserve currency.   Suddenly, the cost of imports soars. Unable to pay for swelling deficits by  selling now-devalued Treasury notes abroad, Washington is finally forced to  slash its bloated military budget.  Under pressure at home and abroad,  Washington slowly pulls US forces back from hundreds of overseas bases to a  continental perimeter.  By now, however, it is far too late.
 Faced with a fading superpower incapable of  paying the bills, China, India, Iran, Russia, and other powers, great and  regional, provocatively challenge US  dominion over the oceans, space, and  cyberspace.  Meanwhile, amid soaring prices, ever-rising unemployment, and  a continuing decline in real wages, domestic divisions widen into violent  clashes and divisive debates, often over remarkably irrelevant issues. Riding a  political tide of disillusionment and despair, a far-right patriot captures the  presidency with thundering rhetoric, demanding respect for American authority  and threatening military retaliation or economic reprisal. The world pays next  to no attention as the American Century ends in silence.
 Oil Shock: Present  Situation
 One casualty of America's waning economic power  has been its lock on global oil supplies. Speeding by America's gas-guzzling  economy in the passing lane, China became the world's number one energy consumer  this summer, a position the US had held for over a century.  Energy  specialist Michael Klare has argued that this change means China will "set the pace in  shaping our global future."
 By 2025, Iran and Russia will control almost  half of the world's natural gas supply, which will potentially give them  enormous leverage over energy-starved Europe. Add petroleum reserves to the mix  and, as the National Intelligence Council has  warned, in just 15 years two countries, Russia and Iran, could "emerge as  energy kingpins."
 Despite remarkable ingenuity, the major oil  powers are now draining the big basins of petroleum reserves that are amenable  to easy, cheap extraction. The real lesson of the Deepwater Horizon oil disaster  in the Gulf of Mexico was not BP's sloppy safety standards, but the simple fact  everyone saw on "spillcam": one of the corporate energy giants had little choice  but to search for what Klare calls "tough oil" miles beneath the surface of the ocean to  keep its profits up.
 Compounding the problem, the Chinese and Indians  have suddenly become far heavier energy consumers. Even if fossil fuel supplies  were to remain constant (which they won't), demand, and so costs, are almost  certain to rise—and sharply at that.  Other developed nations are meeting  this threat aggressively by plunging into experimental programs to develop  alternative energy sources.  The United States has taken a different path,  doing far too little to develop alternative sources while, in the last three  decades, doubling its dependence on foreign oil imports.  Between  1973 and 2007, oil imports have risen from 36%  of energy consumed in the US to 66%.
 Oil Shock: Scenario  2025
 The United States remains so dependent upon  foreign oil that a few adverse developments in the global energy market in 2025  spark an oil shock.  By comparison, it makes the 1973 oil shock (when  prices quadrupled in just months) look like the proverbial molehill.   Angered at the dollar's plummeting value, OPEC oil ministers, meeting in Riyadh,  demand future energy payments in a "basket" of Yen, Yuan, and Euros.  That  only hikes the cost of US oil imports further.  At the same moment, while  signing a new series of long-term delivery contracts with China, the Saudis  stabilize their own foreign exchange reserves by switching to the Yuan.   Meanwhile, China pours countless billions into building a massive trans-Asia  pipeline and funding Iran's exploitation of the world largest natural gas field  at South Pars in the Persian Gulf.
 Concerned that the US Navy might no longer be  able to protect the oil tankers traveling from the Persian Gulf to fuel East  Asia, a coalition of Tehran, Riyadh, and Abu Dhabi form an unexpected new Gulf  alliance and affirm that China's new fleet of swift aircraft carriers will  henceforth patrol the Persian Gulf from a base on the Gulf of Oman.  Under  heavy economic pressure, London agrees to cancel the US lease on its Indian  Ocean island base of Diego Garcia, while Canberra, pressured by the Chinese,  informs Washington that the Seventh Fleet is no longer welcome to use Fremantle  as a homeport, effectively evicting the US Navy from the Indian  Ocean.
 With just a few strokes of the pen and some  terse announcements,  the "Carter  Doctrine," by which US military power was to eternally protect the  Persian Gulf, is laid to rest in 2025.  All the elements that long assured  the United States limitless supplies of low-cost oil from that region—logistics,  exchange rates, and naval power—evaporate. At this point, the US can still cover  only an insignificant 12% of its energy needs from its nascent  alternative energy industry, and remains dependent on imported oil for half of  its energy consumption.
 The oil shock that follows hits the country like  a hurricane, sending prices to startling heights, making travel a staggeringly  expensive proposition, putting real wages (which had long been declining) into  freefall, and rendering non-competitive whatever American exports remained. With  thermostats dropping, gas prices climbing through the roof, and dollars flowing  overseas in return for costly oil, the American economy is paralyzed. With  long-fraying alliances at an end and fiscal pressures mounting, US military  forces finally begin a staged withdrawal from their overseas bases.
 Within a few years, the US is functionally  bankrupt and the clock is ticking toward midnight on the American  Century.
 Military Misadventure: Present  Situation
 Counterintuitively, as their power wanes,  empires often plunge into ill-advised military misadventures.  This  phenomenon is known among historians of empire as "micro-militarism" and seems  to involve psychologically compensatory efforts to salve the sting of retreat or  defeat by occupying new territories, however briefly and catastrophically. These  operations, irrational even from an imperial point of view, often yield  hemorrhaging expenditures or humiliating defeats that only accelerate the loss  of power.
 Embattled empires through the ages suffer an  arrogance that drives them to plunge ever deeper into military misadventures  until defeat becomes debacle. In 413 BCE, a weakened Athens sent 200 ships to be  slaughtered in Sicily. In 1921, a dying imperial Spain dispatched 20,000  soldiers to be massacred by Berber guerrillas in Morocco. In 1956, a fading  British Empire destroyed its prestige by attacking Suez. And in 2001 and 2003,  the US occupied Afghanistan and invaded Iraq. With the hubris that marks empires  over the millennia, Washington has increased its troops in Afghanistan to  100,000, expanded the war into Pakistan, and extended its commitment to 2014 and beyond, courting disasters  large and small in this guerilla-infested, nuclear-armed graveyard of  empires.
 Military Misadventure: Scenario  2014
 So irrational, so unpredictable is  "micro-militarism" that seemingly fanciful scenarios are soon outdone by actual  events. With the US military stretched thin from Somalia to the Philippines and  tensions rising in Israel, Iran, and Korea, possible combinations for a  disastrous military crisis abroad are multifold.
 It's mid-summer 2014 and a drawn-down US  garrison in embattled Kandahar in southern Afghanistan is suddenly, unexpectedly  overrun by Taliban guerrillas, while US aircraft are grounded by a blinding  sandstorm. Heavy loses are taken and in retaliation, an embarrassed American war  commander looses B-1 bombers and F-16 fighters to demolish whole neighborhoods  of the city that are believed to be under Taliban control, while AC-130U  "Spooky" gunships rake the rubble with devastating cannon fire.
 Soon, mullahs are preaching jihad from  mosques throughout the region, and Afghan Army units, long trained by American  forces to turn the tide of the war, begin to desert en masse.  Taliban  fighters then launch a series of remarkably sophisticated strikes aimed at US  garrisons across the country, sending American casualties soaring. In scenes  reminiscent of Saigon in 1975, US helicopters rescue American soldiers and  civilians from rooftops in Kabul and Kandahar.
 Meanwhile, angry at the endless, decades-long  stalemate over Palestine, OPEC's leaders impose a new oil embargo on the US to  protest its backing of Israel as well as the killing of untold numbers of Muslim  civilians in its ongoing wars across the Greater Middle East. With gas prices  soaring and refineries running dry, Washington makes its move, sending in  Special Operations forces to seize oil ports in the Persian Gulf.  This, in  turn, sparks a rash of suicide attacks and the sabotage of pipelines and oil  wells. As black clouds billow skyward and diplomats rise at the UN to bitterly  denounce American actions, commentators worldwide reach back into history to  brand this "America's Suez," a telling reference to the 1956 debacle that marked  the end of the British Empire.
 World War III: Present  Situation
 In the summer of 2010, military tensions between  the US and China began to rise in the western Pacific, once considered an  American "lake."  Even a year earlier no one would have predicted such a  development. As Washington played upon its alliance with London to appropriate  much of Britain's global power after World War II, so China is now using the  profits from its export trade with the US to fund what is likely to become a  military challenge to American dominion over the waterways of Asia and the  Pacific.
 With its growing resources, Beijing is claiming  a vast maritime arc from Korea to Indonesia long dominated by the US Navy. In  August, after Washington expressed a "national interest" in the South China Sea and  conducted naval exercises there to reinforce that claim, Beijing's official  Global Times responded angrily, saying, "The US-China wrestling match over  the South China Sea issue has raised the stakes in deciding who the real future  ruler of the planet will be."
 Amid growing tensions, the Pentagon reported that Beijing now holds "the capability to attack…  [US] aircraft carriers in the western Pacific Ocean" and target "nuclear forces  throughout… the continental United States." By developing "offensive nuclear,  space, and cyberwarfare capabilities," China seems determined to vie for  dominance of what the Pentagon calls "the information spectrum in all dimensions  of the modern battlespace." With ongoing development of the powerful Long March  V booster rocket, as well as the launch of two satellites in January 2010 and another in July, for a total of five, Beijing signaled that  the country was making rapid strides toward an "independent" network of 35  satellites for global positioning, communications, and reconnaissance  capabilities by 2020.
 To check China and extend its military position  globally, Washington is intent on building a new digital network of air and  space robotics, advanced cyberwarfare capabilities, and electronic  surveillance.  Military planners expect this integrated system to envelop  the Earth in a cyber-grid capable of blinding entire armies on the battlefield  or taking out a single terrorist in field or favela. By 2020, if all  goes according to plan, the Pentagon will launch a three-tiered shield of space  drones—reaching from stratosphere to exosphere, armed with agile missiles,  linked by a resilient modular satellite system, and operated through total  telescopic surveillance.
 Last April, the Pentagon made history.  It  extended drone operations into the exosphere by quietly launching the X-37B unmanned space shuttle into a low orbit  255 miles above the planet.  The X-37B is the first in a new generation of  unmanned vehicles that will mark the full weaponization of space, creating an  arena for future warfare unlike anything that has gone before.
 World War III: Scenario  2025
 The technology of space and cyberwarfare is so  new and untested that even the most outlandish scenarios may soon be superseded  by a reality still hard to conceive. If we simply employ the sort of scenarios  that the Air Force itself used  in its 2009 Future Capabilities Game, however, we can gain "a better  understanding of how air, space and cyberspace overlap in warfare," and so begin  to imagine how the next world war might actually be fought.
 It's 11:59 p.m. on Thanksgiving Thursday in  2025. While cyber-shoppers pound the portals of Best Buy for deep discounts on  the latest home electronics from China, US Air Force technicians at the Space  Surveillance Telescope (SST) on Maui choke on their coffee as their  panoramic screens suddenly blip to black. Thousands of miles away at the US  CyberCommand's operations center in Texas, cyberwarriors soon detect  malicious binaries that, though fired anonymously, show the distinctive digital fingerprints of China's People's  Liberation Army.
 The first overt strike is one nobody predicted.  Chinese "malware" seizes control of the robotics aboard an unmanned  solar-powered US "Vulture" drone as it flies at 70,000 feet over the Tsushima  Strait between Korea and Japan.  It suddenly fires all the rocket pods  beneath its enormous 400-foot wingspan, sending dozens of lethal missiles  plunging harmlessly into the Yellow Sea, effectively disarming this formidable  weapon.
 Determined to fight fire with fire, the White  House authorizes a retaliatory strike.  Confident that its F-6  "Fractionated, Free-Flying" satellite system is impenetrable, Air Force  commanders in California transmit robotic codes to the flotilla of X-37B space  drones orbiting 250 miles above the Earth, ordering them to launch their "Triple  Terminator" missiles at China's 35 satellites. Zero response. In near panic,  the Air Force launches its Falcon Hypersonic Cruise Vehicle into an arc 100 miles above  the Pacific Ocean and then, just 20 minutes later, sends the computer codes to  fire missiles at seven Chinese satellites in nearby orbits.  The launch  codes are suddenly inoperative.
 As the Chinese virus spreads uncontrollably  through the F-6 satellite architecture, while those second-rate US  supercomputers fail to crack the malware's devilishly complex code, GPS signals  crucial to the navigation of US ships and aircraft worldwide are compromised.  Carrier fleets begin steaming in circles in the mid-Pacific. Fighter squadrons  are grounded. Reaper drones fly aimlessly toward the horizon, crashing when  their fuel is exhausted. Suddenly, the United States loses what the US Air Force  has long called "the ultimate high ground": space. Within hours, the  military power that had dominated the globe for nearly a century has been  defeated in World War III without a single human casualty.
 A New World Order?
 Even if future events prove duller than these  four scenarios suggest, every significant trend points toward a far more  striking decline in American global power by 2025 than anything Washington now  seems to be envisioning.
 As allies worldwide begin to realign their  policies to take cognizance of rising Asian powers, the cost of maintaining 800  or more overseas military bases will simply become unsustainable, finally  forcing a staged withdrawal on a still-unwilling Washington. With both the US  and China in a race to weaponize space and cyberspace, tensions between the two  powers are bound to rise, making military conflict by 2025 at least feasible, if  hardly guaranteed.
 Complicating matters even more, the economic,  military, and technological trends outlined above will not operate in tidy  isolation. As happened to European empires after World War II, such negative  forces will undoubtedly prove synergistic.  They will combine in thoroughly  unexpected ways, create crises for which Americans are remarkably unprepared,  and threaten to spin the economy into a sudden downward spiral, consigning this  country to a generation or more of economic misery.
 As US power recedes, the past offers a spectrum  of possibilities for a future world order.  At one end of this spectrum,  the rise of a new global superpower, however unlikely, cannot be ruled out. Yet  both China and Russia evince self-referential cultures, recondite non-roman  scripts, regional defense strategies, and underdeveloped legal systems, denying  them key instruments for global dominion. At the moment then, no single  superpower seems to be on the horizon likely to succeed the US.
 In a dark, dystopian version of our global  future, a coalition of transnational corporations, multilateral forces like  NATO, and an international financial elite could conceivably forge a single,  possibly unstable, supra-national nexus that would make it no longer meaningful  to speak of national empires at all.  While denationalized corporations and  multinational elites would assumedly rule such a world from secure urban  enclaves, the multitudes would be relegated to urban and rural  wastelands.
 In Planet of Slums, Mike Davis offers at least a partial  vision of such a world from the bottom up.  He argues that the billion  people already packed into fetid favela-style slums worldwide  (rising to two billion by 2030) will make "the 'feral, failed cities' of the  Third World… the distinctive battlespace of the twenty-first century." As  darkness settles over some future super-favela, "the empire can deploy  Orwellian technologies of repression" as "hornet-like helicopter gun-ships stalk  enigmatic enemies in the narrow streets of the slum districts… Every morning the  slums reply with suicide bombers and eloquent explosions."
 At a midpoint on the spectrum of possible  futures, a new global oligopoly might emerge between 2020 and 2040, with rising  powers China, Russia, India, and Brazil collaborating with receding powers like  Britain, Germany, Japan, and the United States to enforce an ad hoc  global dominion, akin to the loose alliance of European empires that ruled half  of humanity circa 1900.
 Another possibility: the rise of regional  hegemons in a return to something reminiscent of the international system that  operated before modern empires took shape. In this neo-Westphalian world order,  with its endless vistas of micro-violence and unchecked exploitation, each  hegemon would dominate its immediate region—Brasilia in South America,  Washington in North America, Pretoria in southern Africa, and so on. Space,  cyberspace, and the maritime deeps, removed from the control of the former  planetary "policeman," the United States, might even become a new global  commons, controlled through an expanded UN Security Council or some ad  hoc body.
 All of these scenarios extrapolate existing  trends into the future on the assumption that Americans, blinded by the  arrogance of decades of historically unparalleled power, cannot or will not take  steps to manage the unchecked erosion of their global position.
 If America's decline is in fact on a 22-year  trajectory from 2003 to 2025, then we have already frittered away most of the  first decade of that decline with wars that distracted us from long-term  problems and, like water tossed onto desert sands, wasted trillions of desperately needed dollars.
   If only 15 years remain, the odds of frittering  them all away still remain high.  Congress and the president are now in  gridlock; the American system is flooded with corporate money meant to jam up  the works; and there is little suggestion that any issues of significance,  including our wars, our bloated national security state, our starved education  system, and our antiquated energy supplies, will be addressed with sufficient  seriousness to assure the sort of soft landing that might maximize our country's  role and prosperity in a changing world.
 Europe's empires are gone and America's imperium  is going.  It seems increasingly doubtful that the United States will have  anything like Britain's success in shaping a succeeding world order that  protects its interests, preserves its prosperity, and bears the imprint of its  best values.