system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Was stuff like ptsd common thousands of years ago when relatives and family died much earlier, or were they less effected by it because it was normal?
gpt
George Carlin does a bit about how the name of PTSD has changed over the course of the 20th Century.   During World War 1, it was "Shell Shock",  later it was "battle fatigue", then " operational exhaustion ", and finally PTSD.

I guess they did have it in the olden days, but if they talked about it, they called it something else.