the perfect utopian world. women are, generally speaking, the superior race. so most if not all the world's problems, i believe, would be solved if just left up to them and a few sentient;) men. and that's probably a good estimate for a stable and healthy population size on the earth. lol

all joking aside, i think this is a great idea(the best ive heard) for a harmonious and happy society on the earth.