Mexico has people descended from Europeans, people descended from North American Indians called Indios, and people who are a mix of the two called Mestizos. Traditionally the ruling class has been European and the Indios have been the revolutionary class. Mexico had a cycle of revolutions that happened about every 80 years, until the last one happened in the early 1900s. By 80 years later, the ruling class figured out how to avoid the next revolution: by exporting the revolutionary class to the USA.