Three months before the Japanese attack on Pearl Harbor, Angus Echols, a member of DuPont’s executive committee, began shaping the chemical giant’s plans for the coming decade. The U.S. would soon be at war, he explained in a series of memos and high-level discussions, and the company needed to aid the effort. But it also needed to think far ahead. When the war ended, Echols argued, women would want to buy cheap stockings. And where was DuPont on this crucial matter?