Is capitalism the only system ever to support large-scale, sophisticated cultures? Hell, no! Gift economies have been doing that splendidly, throughout history. In Native North America, they were the right-hand of our constitutional democracies, and still flourish underground. 

Western thought is ill-equipped to grasp Native American thought, unprimed. Fundamental to western culture is the base number of One: one god, one life, one way, one soul, one true love, etc. Native traditions assume a base number of Two. There cannot be One unless there have first been Two.