The document describes the caste system established by the Spanish in colonial Mexico. It ranked people in a racial hierarchy with Peninsulares (Spanish-born) at the top, followed by Criollos (American-born Spanish), Mestizos (mixed Spanish and native), Indios (natives), and Negroes (African slaves) at the bottom. Over time, factors like language, skills, wealth and cultural identity could allow some groups like Mestizos to rise in status, though discrimination was still prevalent. The caste system shaped Mexican society for centuries and its impacts on racial inequalities may still be felt today.