Felicitas and Gonzalo Mendez helped bring the court case Mendez v. Westminster to challenge the social justice issue of school segregation, specifically the segregation of Mexican American students in public schools. The case argued that segregating Mexican American children into separate schools violated the Equal Protection Clause of the 14th Amendment of the U.S. Constitution. The plaintiffs contended that the policy of segregating students based on their Mexican ancestry produced feelings of inferiority and denied these children equal educational opportunities. The court ruled that such segregation was unconstitutional, marking a significant step toward ending school segregation and promoting social equality in public education.