Economic Population Control

Senator Fowler nodded. "One other little point, Charlie. Just how often do your reproductive castes breed, anyway?" It was Jock who answered. When Charlie hesitated, David Hardy watched with interest-was there communication by gesture? "When they are allowed to," the alien said smoothly. "Don't yours?" "Eh?" "You control your populations through economic incentives and forced emigration. Neither alternative is available to us, yet our reproductive drives are no less strong than yours. Our ...