In the late-1970s, Alaska’s oil output was on the rise. The ascent was timely, coming in the wake of the Opec-engineered oil crisis of 1973, which announced to the world (and the U.S. in particular) that the days of counting on cheap, accessible supplies were gone, though not necessarily for geological reasons. By 1978, Alaskan crude production exceeded one million barrels per day on average for the first time, Energy Department numbers recount. That was roughly 14% of America’s domestic oil production in 1978. Alaska’s output eventually doubled in absolute terms, hitting slightly more than two million barrels a day in 1988.