What have we learned from World War 2?

Answer 1

Perhaps much, perhaps not enough. I once heard a postwar quote from General Omar Bradley saying that we live in an age of nuclear giants and mental infants. We know more about killing than we do about living. Attack before they do (haha, sarcastic) But actually, we learned not to ignore threats like we ignored Hitler for almost a decade of his breaking truces and agreements. Nowadays, there's no way we'll ignore crazy dictators breaking international law, like building illegal WMD's or aiding terrorists. We also learned how to improve explosive devices like hand grenade, learned to combine the rifle and the sub-machine gun into the modern assault rifle, and learned how to improve various fields of aviation, especially fuel effeciency, range, manuverability (did i spell that right) and the use of jet engines. Most of all, we discoverd/invented atomic energy, which (thank god) we have used only for peace since 1945 (no thanks to USSR!)