We are seeing a reversal of one of the major trends covering nearly all of human history - the reversal of the trend toward greater and greater cultural diversification. Describe that pattern and the trend toward greater and greater cultural diversification. How did we come to be so diverse culturally? And, why does it seem to be changing, particularly in recent decades? What were some of the consequences of a trend toward greater cultural diversification and, what are the possible consequences of the shift to less cultural diversification? Discuss.