“Valentine went back to class without answering. That night Demosthenes published a scathing denunciation of the population limitation laws. People should be allowed to have as many children as they like, and the surplus population should be sent to other worlds, to spread mankind so far across the galaxy that no danger, no invasion could ever threaten the human race with annihilation. "The most noble title any child can have," Demosthenes wrote, "is Third.”