Winning War Through Artificial Selection

"The project was cancelled," said Nessus. "We found that the Man-Kzin wars put sufficient restriction on kzinti expansion, made you less dangerous. We continued to watch. "Six times over several centuries, you attacked the worlds of men. Six times you were defeated, having lost approximately two-thirds of your male population in each war. Need I comment on the level of intelligence displayed? No? In any case, you were never in real danger of extermination. Your nonsentient females were lar...