Albert Einstein, upon careful consideration of what an Atomic Bomb would be capable of, and its scary ramifications, doesn't urge FDR to build the A-Bomb; indeed, Einstein, after deep consideration into the matter, decides that he will attempt to focus instead on the plight of Europe's Jews, for which he will ultimately become the Second President of Israel after the War.
But the outcome is simple: No Manhattan project. Japan either decides to surrender after prolonged bombing (which is very plausible, the A Bomb was just another means to wipe out a city), or the USA launches Downfall.
Nor does this rule out the creation of the Atomic bomb in the future. But how does history develop if the A Bomb is, at most, one more insane idea in Hitler's notes in 1945?
But the outcome is simple: No Manhattan project. Japan either decides to surrender after prolonged bombing (which is very plausible, the A Bomb was just another means to wipe out a city), or the USA launches Downfall.
Nor does this rule out the creation of the Atomic bomb in the future. But how does history develop if the A Bomb is, at most, one more insane idea in Hitler's notes in 1945?