Re:Gorilla Youngsters Seen Dismantling Poachers’ Traps (2012)
by hyperpallium on Friday June 14, 2019 @03:13AM
(#20181072)
Matt Ridely argues something like this, characterising it as trade within a group, and perhaps it began with the hunter/gatherer division of labour between the sexes.
https://wikipedia.org/wiki/The_Rational_Optimist
Can you elaborate on your sources?