Epigenetics

Nutritional epigenetics. Initial access to nutrient dense food -> increased intelligence -> cooperation -> improved nutrition -> increased intelligence -> big brain -> upright posture -> appendages to use tools -> further improving nutrition -> ... -> ... All the while bad genes getting killed off. You're probably right though that after a certain point upright posture was achieved yet the brain continued developing and those phenomena you described necessitated further genetic selection.-- Theodoric 3 months ago Youtube.com.
== Media ==
Documentaries
* The Ghost In Your Genes
----