Public service, private enterprise, academia, government, and politics—Ertharin Cousin has done it all. She’s best known for her roles as executive director of the World Food Programme and U.S. ambassador to the United Nations Agencies for Food and Agriculture, but the IFT FIRST keynoter also spent seven years working as a public affairs executive for the Albertsons grocery chain in addition to stints as an assistant attorney general in Illinois and with the U.S. State Department as a White Hous…