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 11/27/11(Sun)09:05 No. 442804       File1322402701.jpg -(53 KB, 520x344, afghanistan 1970..jpg ) Historyfag here. Really it comes down to Geography. There
 is a reason the Middle East was essentially the birth place of 
civilization, easy tamable animals/beasts of burden and incredibly 
nutritious and easily manageable crops. When people spread out to the 
east and west, they followed pretty much the same latitude so the crops 
could be grown in the same climate, this is why you find most major 
civilizations just above or below The Tropic of Cancer. In many 
other people didn't have access to the animals or the crops so they had 
to spend most of their time gathering food so they could survive, unlike
 in Europe or Central Asia or The Middle East where you had enough food 
to not only easily survive, but support people who did other things, 
like research technology. You must also remember that many "poor"
 countries today were not so poor in the past and are only that way 
because of colonization. Take the Aztecs and Mayans for example, huge, 
powerful, rich and advanced civilizations wiped out by by a literal 
handful of Spanish, or the African Kingdoms wiped out by French, Dutch 
and British colonists. If you want to see an example of this happening in the modern day, this is a picture of a school in Afghanistan in the 1970s.