From Plato to Karl Marx and beyond, the fundamental problem has always been: who should rule the state? (One of my main points will be that this prob… - Karl Popper

One cannot do justice to Marx without recognizing his sincerity. His open-mindedness, his sense of facts, his distrust of verbiage, and especially of moralizing verbiage, made him one of the world’s most influential fighters against hypocrisy and pharisaism. He had a burning desire to help the oppressed, and was fully conscious of the need for proving himself in deeds, and not only in words. His main talents being theoretical, he devoted immense labour to forging what he believed to be scientific weapons for the fight to improve the lot of the vast majority of men. His sincerity in his search for truth and his intellectual honesty distinguish him, I believe, from many of his followers (although unfortunately he did not altogether escape the corrupting influence of an upbringing in the atmosphere of Hegelian dialectics, described by Schopenhauer as ‘destructive of all intelligence’). Marx’s interest in social science and social philosophy was fundamentally a practical interest. He saw in knowledge a means of promoting the progress of man.

We see here that Plato recognizes only one ultimate standard, the interest of the state. Everything that furthers it is good and virtuous and just; everything that threatens it is bad and wicked and unjust. Actions that serve it are moral; actions that endanger it, immoral. In other words, Plato’s moral code is strictly utilitarian; it is a code of collectivist or political utilitarianism. The criterion of morality is the interest of the state. Morality is nothing but political hygiene.

This is the collectivist, the tribal, the totalitarian theory of morality: ‘Good is what is in the interest of my group; or my tribe; or my state.’ It is easy to see what this morality implied for international relations: that the state itself can never be wrong in any of its actions, as long as it is strong; that the state has the right, not only to do violence to its citizens, should that lead to an increase of strength, but also to attack other states, provided it does so without weakening itself. (This inference, the explicit recognition of the amorality of the state, and consequently the defence of moral nihilism in international relations, was drawn by Hegel.)

We can all participate in the heritage of man. We all can help to preserve it. And we can all make our own modest contribution to it.
We must not as for more.