The Pros and Cons of ICS have been discussed in other threads. I'm formly in support of murdering it. My solution... Governance It's not cheap to run an empire. To that end I propose that per tile and per city creates a gold cost. Per tile consumes .10 Golds, per City consumes 3 Golds. If your empire is unable or unwilling to pay the cost of expansion expansion ceases and within a few turns begins to regress. If you allow it to regress far enough it begins to consume your cities, which devolve into lawlessness and become barbarian cities. This can never happen to your capital. This would effectively kill ICS, and quickly while still allowing players to build both small and sprawling empires, especially considering how much Gold later massive empires are raking in per turn.