Albert Einstein cheated on his wife, belittled her scientific achievements, and refused to help out around the house and made her sign a contract in which she would agree to leave the room or stop talking if he told her to.

Although he was a devoted pacifist, Einstein wrote a letter to President Roosevelt, urging him to prioritize the development of an atomic weapon before Nazi Germany.

Albert Einstein renounced his German citizenship in the German Kingdom of Württemberg to avoid military service in 1896 and became stateless for 5 years. He acquired Swiss citizenship in February 1901, Austrian citizenship in 1911, and American citizenship in 1940.