I have played many games in which I thought I was doing well until I was suddenly overrun or outpaced by the enemy. Does anyone have any benchmarks that might foretell doom or predict success before it comes? I'm thinking something like "five cities by 2,000 B.C.", or "thirty shields of production by 2,500 B.C.". Something along those lines. I usually try for a 20K victory because I dislike the war aspect of the game, and in that regard I think a set of benchmarks would be particularly valuable.