I wonder how does everyone usually use their great people. I ususally perfer to let them create an academy if the city doesn't have one yet, otherwise let them join the city to improve the city's output. But yesterday I read at somewhere that great people only last for a certain period of time?
If that's the case, it would make more sense to let them just product one time contribution to the city instead...

If that's the case, it would make more sense to let them just product one time contribution to the city instead...