45°38'N-13°47'E;12822158 said:That's correct.
Here's where we were discussing about it
http://forums.civfanatics.com/showthread.php?t=477066
World population limit is 2147483647 which is the max integer you can have on 32bit (Civ4 it's a 32-bit application).
2^31(2 to the power of 31) -1 = 2147483647
That's why you can't have bigger cities and why population is "scaled down".
Are you sure about this?
I remember discussion about this long time ago (2008?

So maybe theres no need to this population reducing? 2 billion for one civ is probably enough in 99% games?

Btw great to see AND live and well
