Hypothesis 17
The end of brain growth
Uru Island, traders, Lake Titicaca, Peru
The beginning of the hominid brain network is the observed end of brain growth at the onset of Homo sapiens about 250,000 years ago.
The individual hominid brain does not need to grow because it communicates with other brains and outsources tasks and knowledge to the brains of other individuals: in other words, because it can form a network.