User blog comment:Nkbeeching/Eurasian Supremacy based on Geographic Luck?/@comment-32656-20120902033049/@comment-4780584-20120907000114

i gave a very simplified summary of the book it actually talks about those things, the americas developed agriculture in the andes, mexico and the eastern usa but ultimately they were unable to do much with this due to major geographic barriers, i suggest reading it to understand what im talking about, also the only large domesticated animal in the americas was the llama which made the creation of widespread deseases inpossible and the creation of cavalry (one of the greatest eurasian tools of conquest impossible), major reason why africa failed to expand as well not one of their animals was domesticatible. Tamable yes but domesticatable no. again the book expresses many things but i simply gave a very simple summary.