I think there's been a mindset for too long that nomadic means unsophisticated. I disagree. I'll submit that a nomadic society, especially one that encountered other cultures on a fairly frequent basis had to be fairly open & flexible to other cultures' ways of life. Clearly there was some trade involved & it's not a stretch to assume that there may have been some intermarriage.
Pasture areas - both winter & summer, had to be decided; through clashes or negotiation... then that had to be held against other groups interested in the same real estate. Methods of identifying & controlling the movements of their agricultural animals would have been crucial & the prompt & proper preparation of food & items for easy travel would have involved some pretty cool innovation.
Is it too much of a stretch to think that many nomadic groups CHOSE to remain nomads? It's not as though land to settle wouldn't have been available. Developing a rich cultural life was more than possible - nomads aren't chronic roaming gnomes. They spent & spend long periods of time at various encampments leaves time - when you're not hunting & gathering - to develop an oral tradition, crafts & embellishments for the necessary tools of living.
Dying to have a look through the various slide shows that accompany this article - thanx.
Don't die a virgin. Terrorists up there are waiting for you.