I.The daily round from bed to bed.II.The annual round from year to year, like that of the Tunguse Orochon of Siberia who in pursuit of various fish and game change their residence within their territory from month to month, or the pastoral nomads who move with the seasons from pasture to pasture.III.Less systematic outside movements covering the tribal sphere of influence, such as journeys or voyages to remote hunting or fishing grounds, forays or piratical descents upon neighboring lands eventuating usually in conquest, expansion into border regions for occasional occupation or colonization.IV.Participation in streams of barter or commerce.

V.And at a higher stage in the great currents of human intercourse, experience, and ideas, which finally compass the world.[136] In all this series the narrower movement prepares for the broader, of which it constitutes at once an impulse and a part.
[Sidenote: Importance of such movements in history.] The real character and importance of these movements have been appreciated by broad-minded historians.

Thucydides elucidates the conditions leading up to the Peloponnesian War by a description of the semi-migratory population of Hellas, the exposure of the more fertile districts to incursions, and the influence of these movements in differentiating Dorian from Ionian Greece.[137] Johannes von Muller, in the introduction to his history of Switzerland, assigns to federations and migrations a conspicuous role in historical development.

Edward A.
Ross sees in such movements a thorough-going selective process which weeds out the unfit, or rather spares only the highly fit.

He lays down the principle that repeated migrations tend to the creation of energetic races of men.