JaggedRuler said:So, why is corruption so ridiculously high and what can I do to combat it?
There is really not much you can do to combat corruption. I usually just build an aquaduct/hospital and let it throw to maximum size, then convert half of its citizens to tax collectors or scientists. Each of those totally corrupted city could easily generate up to 40 gpt or 60 beakers of research. Note: all income/science generate by the specialists are 100% uncorrupted.
Seriously though, the number of native citizens doesn't affect the flip probability, it's the number of foreignors and number of resistors. So, a town with 1 foreignor has exactly the same flip probability as a metropolis with 1 foreignor and 40 natives.

. Being a civ with the comercial trait helps quite a bit.
I'll get used to the learning curve of each difficulty level sooner or later (hopefully sooner