When we expanded the Sovereign franchise to include women and blacks, it was NOT called 'Social Justice'. In the case of women's votes, it was called the suffrage movement.
It did not violate the 14th Amendment Equal protection clause, in enforced it, because it insisted we treat women and Blacks just like we treat and protect the rights of all other citizens.
The people alive at the time those judgements were made, and policies (Not Laws) were changed, it changed how the voting laws were implemented, to make them enforced correctly, and universal across all the states, for all citizens. The laws and the Constitution, at the federal level, already stated that ALL citizens got the vote. An amendment already corrected the Constitution for the mistake of the 3/5 of a black person when it came to counting citizens for the sake of House seats distribution.
The Constitution is not something that was ever, by design, supposed to stand on its own. The process for amending the Constitution, makes changes in the Constitution, and it should always be seen as the Constitution is not complete, unless you also include the amendments ratified at the time of the legal / Constitutional issue review.
The 13th Amendment, passed in 1865 ended this practice. From 1865 onward, when you say Constitution, you must include all the amendments, including the 13th, which means the 3/5 stuff is GONE!
The Thirteenth Amendment: Slavery and the Constitution
But 3/5 stuff was NEVER used for basing whether or not a Black-American got to vote or not, it was used to determine which States had how many seat in the House of Representatives.
Blacks were given the right to vote in the 15th amendment, which was ratified in 1870.
From 1870 onward, the amended, complete Constitution gave Blacks the right to vote, or the sovereign franchise, often referred to as Black-Sufferage.
The 19th Amendment gave women the sovereign franchise in 1920, 100 years ago, this year!
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