It is very difficult to make correct assumption about the ancient history of the world as we do not have any written records of history before 5000 history. We do have some form of writings by notches on wood and stones.
Fossils are the best source of information about the ancient cultures as they do give exact information about the culture of there time. Scientist have found 15,000 years old fossils buried in deep in a cave in what is now morocco. Those fossils also contain some info about the culture of there time as they were buried along with beads and sophisticated arrow heads.
It was believed that these people have migrated from Europe but DNA of these fossils does not match with Europeans instead their ancestors were Middle Easterners.
for more detail read this blog.