Learn Chapter 4 - A Truly Beautiful Mind with Free Lessons & Tips

Einstein wrote a letter to Franklin Roosevelt to warn him about the potential development of "extremely powerful bombs of a new type" by Nazi Germany. He urged the President to take action and support research in uranium fission, which led to the Manhattan Project and the eventual development of the atomic bomb.

Einstein reacted to the bombing of Hiroshima and Nagasaki with horror and regret. He had been a pacifist and had advocated for peaceful uses of atomic energy. The realization that his letter to Roosevelt had indirectly contributed to the development of the atomic bomb led to a deep sense of personal responsibility for the casualties. Later in his life, Einstein became an advocate for nuclear disarmament and a world government.

The world remembers Einstein as a ‘world citizen’ because of his active engagement in global issues, beyond his contributions to science. His advocacy for peace, his warnings against the dangers of nuclear weapons, and his support for civil rights and non-violent resolution of conflicts showed his deep concern for humanity as a whole.

People called Einstein a world citizen due to his involvement in international movements for peace and his efforts to promote global understanding and cooperation. His stance on issues affecting all of humanity, such as the call for a global governing body to prevent war and his efforts to assist refugees, demonstrated his commitment to global citizenship.

Einstein is remembered as a world citizen because of his significant contributions to peace, his outspoken political views, and his advocacy for social justice. His commitment to humanitarian causes and his vision for a better world where science serves humanity contributed to his legacy as a global figure who transcended national boundaries.

Einstein wrote a letter to Franklin Roosevelt primarily to warn him about the potential development of nuclear weapons by Germany and to urge the United States to accelerate its own research into atomic energy. This letter was instrumental in initiating the U.S. government's interest in developing nuclear weapons before Germany could succeed in doing so.