The Takers accumulate knowledge about what works well for things. The Leavers accumulate knowledge about what works well for people.” “But not for all people. Each Leaver people has a system that works well for them because it evolved among them; it was suited to the terrain in which they lived, suited to the climate in which they lived, suited to the biological community in which they lived, suited to their own peculiar tastes, preferences, and vision of the world.”