When both are denied him he turns naturally to his fellow-men--here at least he can find community of interest--here at least he is among beings of his own type.

Hence he confines his attention to the life of humanity, and in this, the universe of mankind, he hopes to find an explanation of his own life, and a value for it.
The progress of humanity, then, must become the aim of life--all our strength and effort must be focussed upon human nature itself.

But an immediate difficulty arises.

Where are we to find Man?
"Is it in the social community where individual forces are firmly welded together to form a common life, or among individuals as they exist for themselves in all their exhaustless diversity ?" If we put the community first, then the social whole must be firmly rooted in itself and be independent of the caprice of its members.

The duty of the individual is to subordinate himself to the community--this means socialism.