Here you have an overview of history which examines the cyclical nature of human cultures. Great republics and empires have risen and fallen over the centuries. When one culture fades away, another has always taken its place. Today we are faced with a global culture, a hodgepodge of cultures to be sure, but all of them linked by trade and economic incentives. If and when the global culture fails or dissolves into warfare, we may find we have destroyed the ecological base on which humans thrive. I have recently drawn from new sources to make the overview less Eurocentric. http://www.psignologic.net/history.html

Thank you for this contribution :)