The 14th Amendment does not include the term “separate but equal.†“Separate but equal†was ratified into American law with the Plessy decision of 1896, which was about race, and properly expelled from American law with the Brown decision of 1954, which was about race. The Equal Protection Clause of the 14th Amendment provided the basis for the latter decision. So not only is “separate but equal†*not* from the 14th Amendment, the 14th Amendment was the righteous instrument of its destruction as an acceptable policy of American government.
Yes the Equal Protection Clause has be