The term "social justice" was coined by a Jesuit nun in the 1800s. To be fair, her original definition was a society where people would be free to do good and to live up to their virtue without oppression. Now, that phrase was commandeered by the Marxists to mean a society with equality of outcome.

In other words, the origin of the phrase may have had good intent, but has been turned into a weapon of evil. Unsurprisingly, the Jesuits were involved.