“A paramount requisite in the American system of public education is social equality” is the most frequently cited. The phrase does significant work: it places equality not as a nice aspiration but as a “paramount requisite” — a foundational requirement of the system. Social equality, in this formulation, is not optional or supplementary to education; it is definitionally required by what American public education is supposed to be.
The statement that education must “be open to all children by unified school association regardless of lineage” is similarly strong. “Unified school association” captures the idea that sharing educational institutions is itself a value, not merely a means to some other end. Children learn things from attending school together that they cannot learn in separate institutions, even well-resourced ones: how to be citizens together, how to navigate difference, how to build the common culture that democratic life requires.
McCormick also wrote that “commingling” of students from different backgrounds was necessary for the development of a “common cultural attitude” for American institutions. This language reflects a particular vision of what American public education is for: not just the transmission of academic content but the formation of citizens capable of democratic self-governance. Citizens who have never encountered one another as children, who have been sorted from the earliest age by ancestry, are not well-prepared for the work of democratic life together.
These formulations anticipated arguments that would be made in Brown v. Board of Education eight years later. The Brown opinion’s famous passage about education as “the very foundation of good citizenship” and as “a principal instrument in awakening the child to cultural values” echoes, in a different voice, the claims McCormick had made in Mendez. Whether Warren and the other justices drew directly from McCormick’s language or arrived at similar conclusions independently is a question about intellectual influence that cannot be definitively answered. What is clear is that both opinions were working with the same underlying understanding of what public education is for.