Is there a way to make AI civs raze cities less frequently?

[Trigan Emperor]

Frequently, the AI will capture large and long-established cities and then raze them. Is there a way to make them do this less often. There is a game option to disable city-razing, but sometimes it's good to have some weak or poorly-placed cities removed from the map. I would like the AI civs to be less likely to raze cities, especially good/big cities. Any way of modding this?