The Singapore-flagged tanker BW Zambesi set sail with little fanfare from the port of Galveston, Tex., on July 30, loaded with crude oil destined for South Korea. But though it left inauspiciously, the ship’s launch was another critical turning point in what has been a half-decade of tectonic change for the American oil industry. The 400,000 barrels the tanker carried represented the first unrestricted export of American oil to a country outside of North America in nearly four decades. The Obama administration insisted there was no change in energy trade policy, perhaps concerned about the reaction from environmentalists and liberal members of Congress with midterm elections coming. But many energy experts viewed the launch as the curtain raiser for the United States’ inevitable emergence as a major world oil exporter, an improbable return to a status that helped make the country a great power in the first […]