The United States sent Japanese American citizens to internment camps.
The Germans, Japanese and Soviets all worked prisoners of war to death.
Frighteningly, I believe it will always be not so much the technology that kills, but the good old fashioned human evil operating the technology.
4. The greatest generation.
My parents were kids during the Great Depression and the Second World War.
Maybe your parents belonged to the generation too, more likely it's your grandparents.
Regardless, Americans born in the years between the two world wars have lived through more history than any other American generation.
It's easy for those of us born after the Second World War to see that the depression wouldn't last or that the Allies would win World War II,
but back in the day there was no guarantee that America wouldn't go broke, there was no guarantee that the Axis wouldn't win.
This generation faced poverty and rationing and the loss of loved ones, but they got back and came out on top.
If you haven't had the chance to talk with one of these senior citizens about what life was like during the Great Depression and the Second World War,
please do yourself a favor and hurry up.
This opportunity will not be around forever.