In fairness WW2 was started by an insane dictator- nobody in Europe besides Hitler was particularly eager for it. And it was economically and socially irrational. Certainly didn't pan out well for Germany.
WW2 was started by no less than 2 insane dictators, with the blueprint of the events to follow set in the secret pact of the MRP [1].
One of them ended up on the victors' side and the regime continuing to bring terror, misery and economic ruin to parts of Europe for a half century.
[1] https://en.wikipedia.org/wiki/Molotov%E2%80%93Ribbentrop_Pac...