Comment by joshuahedlund
2 years ago
> Granted the last 20 years has been pretty awful, with 9/11, various wars, and other things.
This might be a side trail, but you can find at least as much awful - probably quite a bit more - in any previous 20 year period. (Iraq War? How about two world wars? Financial crisis... Great Depression? 9/11 and fear of terrorists? Cold war and fear of global annihilation? etc)
Bingo. The time period of this study is pretty much the golden age of peace and stability worldwide.