well, sub-saharan africa has contributed nothing, so you can cross them off your list right away, it is pretty well accepted that it was only when early man left africa and migrated into central Asia, and mutated into asian, then caucasian races that man developed civilizations, they migrated to north america which only produced very primitive civilization, with no contributions to western civilization, and with almost no development. it was only when early humans returned as a different race to egypt and then west to Greece that human civilization began to develop, with mathematics, astronomy, philosophy, architecture, skilled trades like ship building, metal fabrication, and this is also when the arts began to become valued. This led to the founding of the roman emipre
