May I request a very small increase to the “majority culture” negative population value applied to foreigners? The problem is that the foreigner population starts out so large that with high overall growth (developed buildings, food surplus, etc) it simply grows uncontrollable. Even if first through third classes are growing at 6-8%, a .5% growth of foreigners means your cities fill to the cap with them. I think a .5-1% additional penalty would suffice and make conversion more manageable.