He should read about the history of Liberia.

https://act.dsausa.org/donate/donation

What other cities have ranked-choice voting or approval voting?

There is a proportional ranked choice voting system called STV.

https://en.wikipedia.org/wiki/Single_transferable_vote

So anyone who doesn’t kneel and worship some person in the White House will be banished to a foriegn gulag?

They are afraid of what he represents.

Which of those extremes does most of the population benefit the most from?

Are you talking about the Dunbar number?