Alonso S. Perales (1898-1960) was well-known in the Mexican American community. He left a legacy of being a civil-rights leader and activist for La Raza.  Perales faought for the injustices brought against Mexican Americans because they were being discriminated against in public places and education. His influence was apparent through politics, religion, diplomacy, law, etc.

One of Perales' major accomplishments was the creation and one of the founding member of the League of United Latin American Citizens (LULAC) in 1929.  He also started a chapter in San Antonio, Texas.  LULAC was established to help people fight prejudice, discrimination, and segregation especially in public places and schools.  Being one fo the earliest Mexican American lawyers, Perales used his influence in politics to see how he could change things.