Ozymandius
Prince
If you like the income and capture of towns then there are real advantages to allowing opponents to respawn... When your opponent is ready to make peace... in other words, responds to your envoy... capture/destroy his last settlement. His civ will be relocated but now has a worker and 100 gp. For peace he will give the 100 gold, worker and world map.. He will then build another town somewhere which can be recaptured later on... Really helps in expanding your holdings... especially when you milk the results and speed of victory is not important.