Although farming of any sort was almost as impossible in the plains as in the dry regions of winter rains farther west, the abundance of buffaloes made life much easier in many respects. ↗
The Indians could not undertake any widespread cultivation of the plains not only because they lacked iron tools but also because they had no draft animals. ↗
Suppliers and especially manufacturers have market power because they have information about a product or a service that the customer does not and cannot have, and does not need if he can trust the brand. This explains the profitability of brands. ↗