Tiny Blunders/Big Disasters

With so many historical errors and disasters, I wonder what criteria were used to select these thirty-nine. Did any particularly surprising stories almost get left out?

Some mistakes are almost funny in hindsight, but they had serious repercussions. It made me wonder how many other small errors could have changed history even more.

The idea that tiny mistakes can have such big impacts is fascinating. I'm curious what led to the decision to frame these stories around minor errors with major consequences.