** spoiler alert ** 
 Definitely a good book with some good ideas. The Moties were a pretty interesting race. I had trouble believing a lot of the science. For example the first empire had a war that destroyed everything and no one saved a storage device somewhere with all their technology on it? Really? And the Watchmakers can go from birth to improving on force fields in a few months with no instruction!, but the Moties can't figure out how to control their birth rate in order to save their whole species from the Cycles. Hrm, didn't they genetically engineer their different castes? And they genetically engineered the Meat. The concept of an animal called Meat amuses me. Hm, well it was written in 1975 so maybe I should give the authors a break! 
 Even without a crazy forced birthrate the main problem discussed in the book may still occur. With two species with faster than light travel how long until the galaxy fills up? Would we create some technology that quickly terraforms planets? Some technology that creates planets? Or just birth control laws. What if we could reverse a black hole and pop planets out of it? I think at that point life would feel like the end of a video game where you've leveled up too much and everything is easy and boring. So, what happens when computers and robots can do everything better than we can? Is everything just free, and no one has to work, and people just take up full time hobbies and do whatever they want? Sorry Moties, your Warriors may be amazingly good, but they would be sheep to robots.