Where can I read more about this time? What do we call this period of history? Who were the major political/ military players of this time?
The period your talking about is called the Stone age. It is generally divided ( at least in Europe) into 3 sub periods , the Early ,Middle and Late Stone Ages The Early Stone age is generally associated with the end of the Ice Age Here's a nice list of books https://www.questia.com/library/sociology-and-anthropology/cultures-and-ethnic-groups/ancient-civilizations/stone-age