brain-growth

Updated: May 8, 2025

That they have made this much of change in the course of two centuries must be accounted remarkable, for they have been compelled, so to speak, to jump one entire ethnical period, without the experience or training of so many intervening generations, and without the brain-growth such a change of the plan of domestic life implies, when reached through natural individual experience.

Lewis H. Morgan - Houses and House-Life of the American Aborigines