Civilization Originates In Conquest Abroad

Why Were There Far More Species Of Domesticated Animals In Eurasia Than In The Americas? The Americas Harbor Over A Thousand Native Wild Mammal Species, So You Might Initially Suppose That The Americas Offered Plenty Of Starting Material For Domestication.

Eurasia's Main Axis Is East/west, Whereas The Main Axis Of The Americas Is North/south. Eurasia's East/west Axis Meant That Species Domesticated In One Part Of Eurasia Could Easily Spread Thousands Of Miles At The Same Latitude, Encountering The Same Day-length And Climate To Which They Were Already Adapted.

With The Rise Of Chiefdoms Around 7,500 Years Ago, People Had To Learn, For The First Time In History, How To Encounter Strangers Regularly Without Attempting To Kill Them.

In Much Of The Rest Of The World, Rich People Live In Gated Communities And Drink Bottled Water. That's Increasingly The Case In Los Angeles Where I Come From. So That Wealthy People In Much Of The World Are Insulated From The Consequences Of Their Actions.

Livestock Adopted In Africa Were Eurasian Species That Came In From The North. Africa's Long Axis, Like That Of The Americas, Is North/south Rather Than East/west. Those Eurasian Domestic Mammals Spread Southward Very Slowly In Africa, Because They Had To Adapt To Different Climate Zones And Different Animal Diseases.