“Undoubtedly,” it will be said, “religious, moral, philosophical, and juridical ideas have been modified in the course of historical development. But religion, morality, philosophy, political science, and law, constantly survived this change.”
“There are, besides, eternal truths, such as Freedom, Justice, etc., that are common to all states of society. But Communism abolishes eternal truths, it abolishes all religion, and all morality, instead of constituting them on a new basis; it therefore acts in contradiction to all past historical experience.” […]
The Communist revolution is the most radical rupture with traditional property relations; no wonder that its development involved the most radical rupture with traditional ideas. …
— Manifesto, ch. 2>>>>>>
Compare/contrast Manifesto linked in post 14 with the Humanist Manifesto.There are three of them.
The second one tries to criticize Marxist humanism and fails, I noticed.