Lambert's brainchild, the International Best Dressed List, saved the struggling American fashion industry during World War II. The various fashion unions came to Lambert for help because people had stopped buying clothes out of fear of a faltering economy, and scarcity of materials.
"I started the International Best Dressed List as a publicity stunt in 1940, when the fashion world was in wartime chaos, and people had to think about clothes without buying more," wrote Lambert in the foreword to Ultimate Style: The Best of the Best Dressed List, published by Assouline in 2004.