Changes during Early history

     The section on early history included very short versions of the history of a number of societies. There were, of course, many societies that I have not written about. As mentioned, there were already many millions of people by the time any type of writing is known and by 1,000 AD the world’s population was probably more than 250,000,000.
    I hope that the short histories that I have given represent to a great extent all the Homo Sapiens that lived in those times, but I cannot be sure. As can be seen, there are many similarities, but also differences between different groups.
    In this coming section I will briefly write about changes in some areas that are particularly important from a stress perspective.