History I / The Americas: Mesoamerica and the Andes
Practice question · Fill in the blanks

Complete the causal chain behind the collapse.

The Americas had almost no ______ animals to domesticate, so no reservoir of crowd ______, so no acquired ______ — and on contact, roughly 90% of the population died.

Word bank: herd · diseases · immunity · crops · metals

Hints
  1. The chain begins with the absence of domesticable herd animals.
  2. No herds means no crowd diseases and therefore no immunity.
Show the answer

The Americas had almost no herd animals to domesticate, so no reservoir of crowd diseases, so no acquired immunity — and on contact, roughly 90% of the population died.

Why

The whole catastrophe traces to a shortage of domesticable herd animals, no animals, no crowd diseases, no immunity. The conquest was, above all, a biological event.

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