Cement floors, Radicals and Vice Presidents

Dad's letter has a lot in it. He describes a cement floor they put in. Talks about his future plans. I like the part about continuing to think and change and then he talks about radicals including Jesus. Last he speaks about the change in the democratic ticket from Wallace to Truman. I am interested in history and in these kind of small events that maybe ended up being large ones. How different would our world be if FDR had stuck with Wallace in '44? We also recently on the trip to Austin listened to The Lacuna by Barbara Kingsolver, I found Trotsky's story fascinating. Why did we end up with Stalin and Truman instead of Trotsky and Wallace? What forces took us that way. I do think that the US lost a lot in WWII.