Did We Evolve from Lobsters?

Peterson says: “We diverged from lobsters' evolutionary history about 350 million years ago. Common ancestor. And lobsters exist in hierarchies. ... As a result, the human nervous system and lobster nervous system largely developed independently of each other with few shared roots.

What happened to the lobsters after they were injected with serotonin?

5HT-injected crayfish and lobsters continued to engage their opponents and continued fighting in situations that ordinarily would result in withdrawal. It appears, therefore, that, for a period of time, amine injection altered the animals' decision to retreat and behave as a subordinate.

What does Peterson say about lobsters?

As a scientist with a biological/palaeontological bent, I think I 'got' the lobster thing immediately. The smart move that Peterson made was to identify a creature that demonstrated dominance hierarchy behaviour — and which branched off from us in an evolutionary sense (lobsters are arthropods), a long, long time back.