It is very easy to make preachments about slavery and to express our moral indignation at such a scandalous institution. Unfortunately the whole significance of this is that it merely says that these old institutions do not correspond with our present conditions and the sentiments engendered by these conditions. We do not however in this way explain how these institutions came into existence, why they came into existence and the role which they have played in history. And when we enter upon this matter we are obliged to say in spite of all contradiction and accusations of heresy that the introduction of slavery under the conditions of that time was a great step forwards. It is a fact that man sprang from the lower animals and has had to employ barbaric and really bestial methods in order to rid himself of barbarism. The old communal system where it persisted built up the most elementary form of the state, Oriental despotism, from India to Russia. Only where it has been dissolved has the people progressed and the next economic step lay in the development of production by means of slave labor. It is evident that as long as human labor was so little productive that it afforded only a small surplus over the necessary means of life, the development of the productive forces, the institution of commerce, the development of the State and of law and the foundation of art and science were only possible through an increase in the subdivision of labor. This implied the broad division between the mass of the workers and the directors of labor, trade, state, state-business, and later the occupation of a few privileged persons in art and science. The simplest and most natural form of this subdivision of labor was slavery. In the conditions of the ancient, and especially the Greek world, the advance to a society founded on class distinction could only be for the slaves, the prisoners of war from whom the majority of slaves were recruited instead of being murdered as they would have been at an earlier date or instead of being eaten as they would have been at a stage still earlier.