The people of the Northwest coast had access to vast natural resources from the sea and forest, allowing them to develop societies with different social classes based on wealth. The lands of the Southwest peoples were arid so they resorted to farming their lands with the help of irrigation.

This led to the development of agrarian societies in the Southwest, with different social classes based on agricultural production and land ownership.

In the Northwest coast, the abundance of seafood, marine mammals, and forests provided a rich and reliable source of sustenance. This allowed some individuals and families to accumulate wealth through fishing, hunting, and gathering resources like cedar for building canoes and houses. The possession of these resources often conferred status and power within the community. Those who had access to more resources were able to trade with neighboring tribes, acquire valuable goods, and enhance their social standing.

As a result, social hierarchies emerged in Northwest coast societies, with prominent individuals and noble families occupying positions of prestige and leadership. These elites often held exclusive rights to certain fishing or hunting sites, which further increased their wealth and power. They also had access to more elaborate ceremonial items, displayed their wealth through decorative clothing and jewelry, and held feasts and potlatches to showcase their status.

In contrast, the peoples of the Southwest faced major challenges due to the arid nature of the region. However, they developed sophisticated irrigation systems to cultivate crops such as maize, beans, and squash. By diverting water from rivers and streams, they were able to create fertile lands in an otherwise harsh environment.

The ability to harness water for agriculture created a different kind of social structure in the Southwest. Land was a scarce and valuable resource, and individuals or families who controlled and cultivated larger plots of irrigated land gained wealth and influence within their communities. These individuals often became community leaders, and their success in agriculture contributed to their standing and social status.

However, the social structure in the Southwest was generally less stratified compared to the Northwest coast. While there were some individuals or families who held more wealth and influence, there was typically a greater emphasis on communal cooperation and shared resources in the Southwest. This is reflected in the religious and ceremonial practices of the region, which often emphasized community-wide participation and reciprocity.

In summary, the availability of natural resources shaped the social structures of the Northwest coast and Southwest peoples. The Northwest coast societies developed social classes based on the accumulation of wealth from the sea and forest resources, while the arid Southwest regions relied on farming and irrigation, leading to a more communal-based social structure with less pronounced social classes.