I love this Reddit post: Lycerious has been playing Sid Meier's Civilization II for 10 years (not everyday) and has ended up in a nightmarish, apocalyptic world of perpetual nuclear and conventional war, global warming with oceans covering most of the land, only three mega empires left, and the remaining land is devastated and cannot support agriculture or urban civilization.
I was forced to do away with democracy roughly a thousand years ago because it was endangering my empire.You've heard of the 100 year war? Try the 1700 year war. The three remaining nations have been locked in an eternal death struggle for almost 2000 years. Peace seems to be impossible. Every time a cease fire is signed, the Vikings will surprise attack me or the Americans the very next turn, often with nuclear weapons.As a result, big cities are a thing of the distant past. Roughly 90% of the worlds population (at it's peak 2000 years ago) has died either from nuclear annihilation or famine caused by the global warming that has left absolutely zero arable land to farm. Engineers (late game worker units) are always busy continuously building roads so that new armies can reach the front lines. Roads that are destroyed the very next turn when the enemy goes. So there isn't any time to clear swamps or clean up the nuclear fallout.