chunk: Eventually, they learn the truth. A plague wiped out most human life, including all males. Only about 11,000 people survived, mostly concentrated in Australasia and a few other areas. They reproduce by cloning, and all living humans are clones of the original 11,000 genotypes. Babies are raised communally in crĂ¨ches, and all members of each genotype are encouraged to add their story to a book that is passed on for the inspiration and education of future "sisters." Certain genotypes are given early androgen treatments (hence, the pseudo-male crew member) to increase bulk and strength for physical tasks. The resulting almost communal maleless society has settled into a peaceful patternâwithout major conflict, seemingly happy, but with little advancement.