Is there a way to modify the ability of the computer players to build/maintain units without resources? I get later in the game and the computer will declare war on me out the blue and attack me on Byzantium Secundus with a stack of 18 spies which is instant death. This is around turn 50.

Also, when I end up attacking one of the computer-player planets they have built about 100 cities all over the planet. I know if I tried that the whole planet would starve.