From that spirit only vain dreams and fantastic vagaries can ever come. What we must bear in mind is that the social fabric of to-morrow, like that of yesterday, whose ruins we contemplate to-day, will not spring up, complete, in response to our will, but will grow out of social experience and needs. II One of the greatest and most lamentable errors in connection with the propaganda of modern Socialism has been the assumption of its friends, in many instances, and its foes, in most instances, that Socialism and Individualism are entirely antithetical concepts. Infinite confusion has been caused by setting the two against each other. Society consists of an aggregation of individuals, but it is something more than that in just the same sense as a house is something more than an aggregation of bricks. It is an organism, though as yet an imperfectly developed one. While the units of which it is composed have distinct and independent lives within certain limits, they are, outside of those limits, interdependent and inter-related. Man is governed by two great forces. On the one hand, he is essentially an egoist, ever striving to attain individual freedom; on the other hand, he is a social animal, ever seeking association and avoiding isolation. This duality expresses itself in the life of society. There is a struggle between its members motived by the desire for individual expression and gain; and, alongside of it, a sense of solidarity, a movement to mutual, reciprocal relations, motived by the gregarian instinct. All social life is necessarily an oscillation between these two motives. The social problem in its last analysis is nothing more than the problem of combining and harmonizing social and individual interests and actions springing therefrom.