Albert Einstein Einstein did not return to Germany. He settled in the United States and became an American citizen in 1940. On the eve of World War II, he endorsed a letter to President Franklin D. Roosevelt alerting him to the potential development of "extremely powerful bombs of a new type" and recommending that the US begin similar research. This eventually led to the Manhattan Project. Einstein supported the Allies, but he generally denounced the idea of using nuclear fission as a weapon. He signed the Russell–Einstein Manifesto with British philosopher Bertrand Russell, which highlighted the danger of nuclear weapons. He was
Albert Einstein in popular culture on a computer or smartphone. The project was created in collaboration with the Albert Einstein Archives Jerusalem and presented 2015 on the crowdfunding platform Kickstarter where the campaign was supported by 2334 backers. Each letter of the font is based on Einstein's manuscripts, different variations of each letter are stored in the font and exchanged automatically during typing to create a natural look. The Albert Einstein font was used to reenact the 1932 letter exchange between Einstein and Sigmund Freud. In 2017 at the 85th anniversary of the exchange, which was published in 1933 under the title "Why War", Harald