Eight to ten generations? People estimate it would take that long to get terraforming?
ETA: I wasn’t caught up on Incredible Things, and now I’m confused that Telkam says there have already been eight generations. I thought universal population control only started around the time of the Oakh empire expansion, and Anitam’s in particular did not meet their standards. Amentans live a long time, but not so long that eight generations could pass while Governor Avalor was alive.
Plus inter-caste marriages (and other child-conceiving relationships) make eugenics harder; even something with better selection criteria than an auction wouldn’t aim for intelligent greys instead of physically active ones, and I bet every green has some grey in them in the last few generations.
Although he also said most traits are 70% heritable, which does sound high for humans.
Follow-up question: why aren’t there more twins and triplets?
ETA 2: Human heritability seems to average about 50%: http://www.nature.com/ng/journal/v47/n7 ... .3285.html