Answer: Nixon and Soviet General Secretary Leonid Brezhnev signed the ABM Treaty and interim SALT agreement on May 26, 1972, in Moscow. For the first time during the Cold War, the United States and Soviet Union had agreed to limit the number of nuclear missiles in their arsenals.
I believe that all war can be avoided. As for WWll, I believe there are many steps that could have prevented the war such as the first world war never happening (if you need me to explain this ask and I will), the German citizens standing up, and also the Jewish community coming together to oppose the German government.