what do you do with your tribe after you finish the game?
after you've found all collectibles and relics

Try for a tribe of immortal redheaded JOAT runners.

The oddest end of game for me was when my last villager was a 62 year old woman who was still pregnant with twins. Then suddenly out of nowhwere Rascal showed up. I guess I missed a couple events that brought him back, I'm not sure how he reappeared. When the twin girls were born I was hoping I could convert Rascal who was a boy and keep going on. But I had lost too many god powers, couldn't get enough powers back, and couldn't convert Rascal. The twin girls lived to be in their 60s with Rascal bothering them constantly. When the twins died, I left the game with Rascal running around looking for trouble. So I guess Rascall won that game.

So you gave up on the game?

Yes, I gave up because Rascal was the only one left on the island. I did wait for a while hoping for an event where some other villagers or barrel of babies might arrive, but when that didn't happen. I bid Rascal a fair farewell and gave him the island.

Did you have the earthquake god power?

No, otherwise I would have used it to convert Rascal. I could't get the earthquake power back because I only had the twins. I put them both in the research lab to get more points but they worked hard but couldn't generate enough points to bring the god powers up to earthquake level.

The research lab doesn't have anything to do with the powers.

The way I play for powers is to get as many tech points as I can. The older twins couldn't pick up relics or try to convert Rascal, I really tried but he's a stubborn little stinker. If there's a different way to get the them, someone please post with spoiler.

research points has nothing to do with the powers.... the god powers are directly related to population .....the number of believers. The larger the tribe of believers the more god powers available to you.