Links for Digging Deeper: Podcast #2 500 years of Brutal Evangelization
Wikipedia on Atahualpa: https://en.wikipedia.org/wiki/Atahualpa
Wikipedia on Francisco Pizarro: https://en.wikipedia.org/wiki/Francisco_Pizarro
Wikipedia on the Spanish “Requirement”: https://en.wikipedia.org/wiki/Spanish_Requirement_of_1513
Wkipedia on Bartolome de las Casas: https://en.wikipedia.org/wiki/Bartolomé_de_las_Casas
Francisco Pizarro on PBS http://www.pbs.org/conquistadors/pizarro/pizarro_a00.html
You can buy a DVD “The Conquistadors” on PBS for $19.99 at: https://shop.pbs.org/michael-wood-conquistadors-dvd/product/CQMW601 This includes a lot on Pizarro and the conquest of South America.
Much of my information came from a tour of the ruins at Tiawanaku, just about a two-hour drive outside of La Paz. Be sure and visit if you are in Bolivia. It is worth it. But have an interpreter with you, the guides, obviously, speak Spanish.