Here is an example of a thesis statement:
In the late 19th and early 20th centuries, Mexican immigrant labor was important to the rapid expansion of many United States’ industries including railroads, agriculture, mining and manufacturing, particularly in the Southwest. Compared to other immigrant workers, Mexicans were paid less, and were both more flexible and more stable, which, despite the institutional and social prejudice shown against them for these very factors, positioned them as a desirable workforce that became integral to the economic growth of the U. S.