How did Americans come to own land in California?

California once belonged to Mexico and its land to the Mexicans. But a horde of tattered feverish American poured in, with such great hunger for the land that they took it. Farming became an industry as the Americans took over. They imported Chinese, Japanese, Mexican and Filipino workers who became essentially slaves. The owners of the farms ceased to be farmers and became businessmen. They hated the Okies who came because they could not profit from them. Other laborers hated the Okies because they pushed down wages. While the Californians had aspirations of social success and luxury, the barbarous Okies only wanted land and food. Hoovervilles arose at the edge of every town. The Okies were forced to secretly plant gardens in the evenings. The deputies overreacted to the Okies, spurred by stories that an eleven year old Okie shot a deputy. The great owners realized that when property accumulates in too few hands it is taken away and that when a majority of the people are hungry and cold they will take by force what they need.