Happiness hitherto has been a by-product, and for all we know it may always remain so. The real objective of Socialism is human brotherhood. This is widely felt to be the case, though it is not usually said, or not said loudly enough. And they want that world as a first step. Where they go from there is not so certain, and the attempt to foresee it in detail merely confuses the issue.
Socialist thought has to deal in prediction, but only in broad terms.
One often has to aim at objectives which one can only very dimly see. At this moment, for instance, the world is at war and wants peace. Yet the world has no experience of peace, and never has had, unless the Noble Savage once existed. The world wants something which it is dimly aware could exist, but cannot accurately define. To make that kind of thing impossible is a good objective.