It might be the last truly bipartisan policy aim in Washington, and the least plausible one: Every U.S. president since Richard Nixon has pledged allegiance to the goal of "energy independence," even as the United States has remained dependent on imported oil. And as China's appetite for fossil fuels surpasses America's, energy anxiety has gone global -- just in time for another presidential election year.
Edwin L. Drake drills the world's first oil well outside Titusville, Pennsylvania.
In The Coal Question, British economist William Stanley Jevons warns that Britain is in danger of running out of coal, threatening the country's strategic and economic preeminence -- a matter, he writes, of "almost religious importance."
Winston Churchill, then first lord of the admiralty, begins converting Britain's Royal Navy -- the world's largest-from coal to oil, exchanging energy independence for power and speed. Over the next several years, Britain wrestles the oil fields of the Persian Gulf away from a crumbling Ottoman Empire.
December 1940: Adolf Hitler launches plans to invade the Soviet Union, the main oil supplier of petroleum-poor Nazi Germany. Hitler also builds plants to convert coal into synthetic petroleum, turning out 124,000 barrels a day by 1944.
July 26, 1941: Alarmed by Japan's incursions into Indochina, the U.S. government freezes Japanese assets in the United States, imposing a de facto oil embargo on Tokyo. The Japanese attack Pearl Harbor just over four months later.
Summer 1942: Hitler launches a new offensive against the Soviet Union in hopes of capturing the Caspian oil fields. The resulting defeat at the Battle of Stalingrad in February 1943 marks the beginning of the end for Nazi Germany.
Oil exporters Iran, Iraq, Kuwait, Saudi Arabia, and Venezuela form the Organization of the Petroleum Exporting Countries (OPEC).
After taking power in a military coup, Muammar al-Qaddafi starts nationalizing Libya's oil fields -- then the source of 30 percent of Europe's oil imports -- thus beginning Western oil companies' expulsion from the Arab world.
The United States becomes a net oil importer.
Oil production in Texas, the motherland of U.S. crude, begins to decline. "Texas oil fields have been like a reliable old warrior that could rise to the task when needed," Texas Railroad Commission Chairman Byron Tunnell says. "That old warrior can't rise anymore."
"The era of low-cost energy is almost dead," U.S. Commerce Secretary Peter G. Peterson declares. "Popeye is running out of spinach."
April: In a Foreign Affairs article titled "The Oil Crisis: This Time the Wolf Is Here," James E. Akins, who would become U.S. ambassador to Saudi Arabia that fall, warns that "the threat to use oil as a political weapon must be taken seriously."
October: Egypt and Syria launch a surprise attack on Israel, beginning the Yom Kippur War. The United States responds with $2.2 billion in arms and aid to Israel. The following day, OPEC declares a halt to oil shipments to the United States, Western Europe, and Japan. By January 1974, oil prices have more than quadrupled.
November 7: U.S. President Richard Nixon announces "Project Independence," a plan to wean the United States off foreign oil. The dream of American energy independence is born.
The U.S. Congress passes the Energy Policy and Conservation Act, creating the Strategic Petroleum Reserve and imposing the first fuel-efficiency standards for vehicles.
U.S. President Jimmy Carter makes energy independence the central ambition of his presidency, later establishing the Department of Energy, investing billions of dollars in research and development, and installing solar panels at the White House.
An uprising topples Iran's Mohammad Reza Pahlavi and one of the two pillars of U.S. energy supply in the Middle East crumbles, leaving only Saudi Arabia.
U.S. President Ronald Reagan announces his plan to lift price controls on oil and begins disassembling the renewable-energy research programs begun under Carter.
The Exxon Valdez oil tanker runs aground in Alaska's Prince William Sound. Americans' support for offshore drilling plummets and remains low well into the 1990s.
After accusing Kuwait of stealing Iraqi oil with slant-drilling techniques, Saddam Hussein seizes Kuwaiti oil fields. U.S. President George H.W. Bush leads a coalition to oust him.
For the first time since the 1910s, the United States imports more oil than it produces. Deputy Energy Secretary Bill White describes the situation as "the biggest trade problem we have."
Vice President Dick Cheney's energy task force releases its National Energy Policy. "Our increased dependence on foreign oil profoundly illustrates our nation's failure to establish an effective energy policy," the report states, recommending a renewed commitment to domestic oil, coal, natural gas, hydropower, and nuclear power.
Congress passes the Energy Policy Act, including quotas and millions of dollars in subsidies in hopes of nearly doubling U.S. ethanol production by 2012.
Congress passes the Energy Independence and Security Act, which .imposes tougher fuel-efficiency standards on vehicles and orders a whopping 766 percent increase from 2007's targeted biofuel production by 2022. By 2008, ethanol has become a $32 billion business in the United States.
Oil prices hit a record $148 a barrel.
September: At the Republican National Convention, Michael Steele calls on Americans to "reduce our dependency on foreign sources of oil and promote oil and gas production at home. In other words: Drill, baby, drill!"
China's oil imports surpass domestic production for the first time.
Hashing out its new five-year plan, the Chinese government embraces ambitious new targets for reducing China's reliance on imported oil.
A weak economy and more efficient vehicles cause oil imports to fall below half of U.S. consumption for the first time in 13 years.
The International Energy Agency predicts that the European Union will surpass the United States as an energy importer by 2015.
U.S. shale gas production reaches 5 trillion cubic feet, five times its 1990 level, reigniting hopes for homegrown energy.
Thanks to John Deutch of the Massachusetts Institute of Technology and Michael Graetz of Columbia University.