Late in the game, about 60% in to a Snail mode game, 1800/3000 turns in, for the past hundred turns, the game has been crashing with great frequency, almost always if/when I scroll along the map too much, or click on the minimap too often. Then about the point I mentioned above, I start having the game crash when I capture certain cities. I even used a Fusion nuke on the city, only to have ALL the land around it AND the land under it be blown away, while the city remains intact, on the water. I go into World Builder mode, and I have to click on it many times in order to erase it.
I can't wait 100 turns for the spaceship to arrive somewhere to complete the game; I disabled Religious, Scientific, and Cultural victory from the game, but now, after I've deleted all my opponents except my Permanent Ally, the game hasn't ended.
What needs to happen for it to end with a victory? Why is it crashing so much late in the game?