It won't be that much different than it is now because the change to the human heart must come from within and most people are too lazy to attempt the process.
I imagine there will be people beating each other over the head trying to sit on his right side at the Olive Garden restaurant. And others will try to make some quick cash on miracle curealls.
A whole new level of corruption.
He'll probably just get fed up and leave again.
You probably forgot, but he has a tendency to travel.