Hiroshima: Why America Dropped the Atomic Bomb is a book by Gar Alperovitz that examines the events leading up to and surrounding the dropping of the atomic bomb on the Japanese city of Hiroshima during World War II. The book posits that the decision to use the atomic bomb was not purely military, but was also motivated by political and diplomatic considerations. Alperovitz also argues that the United States could have avoided using the atomic bomb if it had been more willing to negotiate with the Japanese government.