After a 1954 Supreme Court decision, to what two types of institutions did the equal protection clause of the Fourteenth Amendment apply

A primary motivation for this clause was to validate the equality provisions contained in the Civil Rights Act of 1866, which guaranteed that all people would have rights equal to those of all citizens. As a whole, the Fourteenth Amendment marked a large shift in American constitutionalism, by applying substantially more constitutional restrictions against the states than had applied before the Civil War.