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Columbus
Columbus
[[File:GGS-ultimate-proximate-factors p87 w-Americas-added.jpg|thumb|For educational purposes only **not for distribution**]]
[[File:GGS-ultimate-proximate-factors p87 w-Americas-added 2.jpg|alt=|thumb|Ultimate & proximate factors analysis for Eurasia and Americas]]


=== Spanish conquest ===
=== Spanish conquest ===


* a core question about the Columbian exchange is why did the Spanish conquer the Americas in the Americas and one of the Native American empires did not invade and conquer Spain?
* a core question about the Columbian exchange is:
** why did the Spanish invade and conquer the Native Americans and the Native American empires did not invade and conquer Spain?
* Jared Diamond's "Guns, Germs and Steel" explores this question
* Jared Diamond's "Guns, Germs and Steel" explores this question
* Diamond's analysis shows that the "broad" or very long-term causality of the outcome that that Spanish conquered the Americas and not the other way around is due to geography, notably:
* Diamond's analysis shows that the "broad" or very long-term causality of the outcome that that Spanish conquered the Americas and not the other way around is due to geography, notably:
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*** the Americas lacked animals that are appropriate for food consumption and transport
*** the Americas lacked animals that are appropriate for food consumption and transport
**** especially the horse
**** especially the horse
*** many contageous diseases originated from human proximity to domesticated animals
*** many contagious diseases originated from human proximity to domesticated animals
*** lacking those animals, the Americans had no immunity to Eurasian diseases
*** lacking those animals, the Americans had no immunity to Eurasian diseases
** these combinations yielded advantages to Eurasian societies that the Spanish used in their conquest of the Americas, including
** these combinations yielded advantages to Eurasian societies that the Spanish used in their conquest of the Americas, including
*** technologies of guns and steel (used for weapons and tools)
*** technologies of '''guns''' and '''steel''' (used for weapons and tools)
*** horses (war horses provided a considerable military advantage)
*** '''horses''' (war horses provided a considerable military advantage)
*** disease, which killed off a tremendous number of Native Americans and weakened their centralized states
**** especially for mounting soldiers and those metal weapons
*** '''disease''', which killed off a tremendous number of Native Americans and weakened their centralized states
*** '''writing system''' which effectively transmitted information about other people and technologies
**** ex. Marco Polo's journeys were tremendously helpful to Europeans as they learned details about China and other places
**** Inca and Aztec writing systems existed
***** but Inca system of “quipu" beads and strings effectively recorded information but not words
****** see [[wikipedia:Quipu|Quipu (wikipedia)]]
== Plants ==
== Plants ==
* the most important exchange was  
* the most important exchange was