What do you mean “again”? Name one period of history where people didn’t spit on the floor, leave trash around or inconvenience other people.
If he wants a world where everything is clean and everyone behaves, that’s not regression, that’s progress, he’d be making it a reality for the first time. The fact that he thinks people used to behave better in the past is quintessential conservative nostalgia goggles.
I’d come to that party.