sweetpete said:question, What decides the chance of producing the different kinds of great people. .... like 45% chance of great artist, or 70% chance of a great prophet. Cant make any sence of it.
Wonders and specialists.
Every wonder which gives you GP points will give them towards a particular type of GP. For example, the Pyramids gives GP points towards an engineer great person.
Also, specialists give +3 GP points towards their type of great person. For example, using a scientist specialist will give you +3 GP points towards a great scientist.
The article DaviddesJ referenced is VERY handy.
EDIT Actually the way the percentage is calculated is far more complicated than having GP sources contribute "GP points" towards GP types. That explanation is useful as a guide, but the article by Kylearan is much more accurate in its explanation.