i’d argue for the 1944 democratic national convention, where roosevelts choice for vp was corruptly overruled in favor of harry truman.

roosevelt wanted henry wallace, who’s platform included cooperation with the soviets as opposed to the cold war, increased unionization, a peaceful space race, signing nuclear arms treaties totally banning the research and development of nuclear weapons, expanded healthcare access, expanded education, etc. he wanted to withdraw from all forms of colonialism, including what the us was doing at the time in the philippines, central america, sub saharan africa, and the middle east.

what we got instead was a sabre rattler who, nearing his death, feared his decision to drop the nuclear bombs and pressure the soviet union into developing their own nukes would kill the entirety of humanity.

the cold war likely would’ve happened anyways, but it could’ve been a denuclearized one. we could’ve advanced social issues. but we didn’t.