Socialism is the watchword and the catchword of our day. The socialist idea dominates the modem spirit. The masses approve of it. It expresses the thoughts and feelings of all; it has set its seal upon our time. When history comes to tell our story it will write above the chapter "The Epoch of Socialism."
As yet, it is true, Socialism has not created a society which can be said to represent its ideal. But for more than a generation the policies of civilized nations have been directed towards nothing less than a gradual realization of Socialism.

Introduction : The Success of Socialist Ideas - Socialism (1922)