II. The Logic of Thought and the Logic of Reality

For there is an inner impulse in human evolution which works in the logic of realities, although people may not express it in these words. It corresponds to reality and we can state it thus: Even the Grecian Age, the Grecian civilization which has come to mean so much for us, is only thinkable through the fact that a large proportion of the population of Greece were slaves. Slavery, therefore, was the premise of that ancient civilization which signifies so very much to us. So much that the most excellent philosopher, Plato, considered slavery altogether as a justified and necessary thing in human civilization. But the evolution of mankind goes forward. Slavery existed in antiquity and as you know, mankind began to rebel against it, quite instinctively to rebel against men being bought and sold. Today we may say it is an axiom: The whole human being can no longer be bought and sold; and where slavery still exists, we regard it as a relic of barbarism. For Plato, it was not barbarism; it went without saying that there were slaves, just as it did for every Greek who had the Platonic mind, nay every Greek who thought in terms of the state. The slave himself thought just the same, it went without saying that men could be sold, could be put on the market according to the laws of supply and demand, though of course not like mere cattle. Then, in a masked and veiled form, the thing passed over into the milder form of slavery which we call serfdom. Serfdom lasted very long, but here again mankind revolted.