why did the nuclear arms race happen
Introduction The nuclear arms race began during the Second World War. Even before the United States entered the War it feared that Nazi Germany was attempting to develop an atomic bomb.President Roosevelt therefore authorized an experimental nuclear weapons program â the Manhattan Project â in collaboration with Britain and Canada.ther significant issues to consider are why the United States and the Soviet Union thought it was necessary to build so many nuclear weapons, and why the arms race between the Superpowers did not result in a nuclear war.