Occam's Razor: easiest solution, ceteris paribus, tends to be right. In that case, it's more simple to state that the continental axis allowed movement of extra domesticable species, which resulted in agriculture, which led to more and more people freed from manufacturing foodstuff who could then at some point https://mydirectoryspace.com/listings13122371/the-single-best-strategy-to-use-for-beretta-1301