Long time reader, first time poster. I have read a few post on here that suggest Aliens don’t like to interfere with our lives as a whole unless it’s going to be something catastrophic. So it got me thinking was the bomb on Hiroshima not catastrophic enough? Was WW1 or WW2 not catastrophic enough? Was Chernobyl not catastrophic enough? Or did they intervene in their own way and we just don’t know it?