What evidence does kayser provide to justify his argument that there has been a dramatic decline in traditional new sources

Kaiser talked about the fact that with the increase in globalization, trade and businesses among the countries, there has been a drastic decline in the natural resources and this process has also led to the exploitation of these resources.

To prove it right, Kaiser studied the region of Thule Inuit which had a culture which was dynamic and had people from different species and was trading with foreign countries. Commercialization came up with new technology and with this study as an evidence he tried to prove his point right.