Hand in hand with covetousness goes its close companion— invidia or envy—which hates to see other men happy. The names by which it offers itself to the world’s applause are right and justice, and it makes a great parade of these austere virtues. It begins by asking, plausibly, “Why should not I enjoy what others enjoy?” and it ends by demanding, “Why should others enjoy what I may not?” Envy is the great leveler. If it cannot level things up, it will level them down; and the words constantly in its mouth are “my rights” and “my wrongs.”
--Dorothy Sayers, Letters to Diminished Church, Kindle location 1132.
Here is the truth by what usually names itself "social justice".