The foregoing proves that "men can never become richer till the produce of their labour increases. The more they produce the richer they will be, provided there be a demand for the produce of their labour. If a shoemaker makes four pairs of shoes in a day he will be twice richer than he would be if he made only two pairs in a day, provided that an increased demand is co-existing. The question, therefore, 'How can we become richer?' is reduced to this one, 'How can we increase the produce of labour and at the same time maintain an equivalent demand for that produce?'"[215] The doctrines that want and unemployment are due to over-production and to the capitalist system are wrong. We now come to the DOCTRINE OF THE CLASS WAR Having, by the fundamental doctrines enumerated in the foregoing, proved that all misery of the working masses is caused by the existence of a capitalist class which has enslaved the workers, the Socialists conclude that there is a natural antagonism between capital and labour; that social life is dominated by the Class War. "The Socialists say that the present form of property-holding divides society into two great classes."[216] "Capitalist society is divided into two classes: owners of property and owners of no property."[217] "Society is to-day divided into two classes with opposing interests, one class owning the means of life, and the other nothing but their power to work. Never in the history of society was the working-class so free from all traces of property as to-day."[218] "There are in reality but two classes, those who live by labour and those who live upon those who labour, the two classes of exploiter and exploited."[219] "Society has been divided mainly into two economic classes, a relatively small class of capitalists who own tools in the form of great machines they did not make and cannot use, and a great body of many millions of workers who did make these tools and who do use them, and whose very lives depend upon them, yet who do not own them."[220]