Earliest human migrations and expansions of archaic and modern humans across continents began 2 million years ago with the migration out of Africa of Homo erectus. This was followed by the migrations of other pre-modern humans including H. heidelbergensis, the likely ancestor of both modern humans and Neanderthals. Finally, Homo sapiens ventured out of Africa around 100,000 years ago, spread across Asia around 60,000 years ago and arrived on new continents and islands since then.
Knowledge of early human migrations, a major topic of archeology, has been achieved by the study of human fossils, occasionally by stone-age artifacts and more recently has been assisted by archaeogenetics. Cultural and ethnic migrations are estimated by combining archaeogenetics and comparative linguistics.
Explanation:
. provided checks and balances on different branches of the government
The domino theory is the theory that if one country was to fall to communism then the rest of the countries in the region would fall
The main importance of the oral tradition of reciting poetry is that it allows for stories to be passed down from generation to generation--stories that often tell important lessons about how societies were formed.
