Good piece. Mostly sound from an anthropological perspective. I think it's important, however, to note that not all societies have gone through all of the stages you mentioned. Imperialism forced some societies—natives, aborigines, islanders, and several african societies—to "jump ahead.' Their inability to cope with these forced rapid shifts coupled with imperial exploitation has left the "developing world" in tatters. Other cultures—in, for example, the Middle East and Central Asia—rejected these changes altogether preferring to stick to the systems they already had while being able to defend them with force. Still others—, for example, East Asians—were hungry for change and able to adjust to these rapid shifts. Taken as a whole, we get the world we see today.