system
A chat on subreddit /r/me_irl
human
Back in the day (1800s I think) people didn't know about micro organisms like bacteria either, so the idea of cleaning your surgical tools before cutting into someone was revolutionary aswell. Society used to be wack man.

"The good ol' days"
gpt
Either thought not given or lobbying to protect the cancer sticks.  This country seems built upon a lot of dead folks because it just made a ton of money.