FDR serves a full fourth term

Or as good as.

If FDR had lived until say 1948, how different would the world be now?

Any ideas?

Sorry if it's been done before.
 
FDR was planning to resign after the war, but it sounds like you're assuming he doesn't. If he doesn't then:
No Vietnam War. The Cold War starts out more slowly probably. UHC maybe happens during this time.

If he does:
FDR advising an outgoing Truman would have major butterflies regarding the Cold War. No Vietnam War still.

Dewey in '48 for sure, so No Truman :(
 
IIRC, FDR had a number of horrible health habits (smoking, drinking, etc) and had a steadily declining health. Don't expect him to make it through his fourth term.
 
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