David L. Roll is the author of The Hopkins Touch: Harry Hopkins and the Forging of the Alliance to Defeat Hitler and the co-author of Louis Johnson and the Arming of America, a biography of Harry Truman's defense secretary. He is senior counsel at Steptoe & Johnson LLP, a Washington, D.C.-based international law firm; nonresident fellow at the German Marshall Fund; and founder of the Lex Mundi Pro Bono Foundation, a public interest organization that provides pro bono legal services to social entrepreneurs around the world.