We have shown that at the present time individuals must abolish private property, because the productive forces and forms of intercourse have developed so far that, under the domination of private property, they have become destructive forces, and because the contradiction between the classes has reached its extreme limit. Finally, we have shown that the abolition of private property and of the division of labour is itself the union of individuals on the basis created by modern productive forces and world intercourse. Within communist society, the only society in which the original and free development of individuals ceases to be a mere phrase, this development is determined precisely by the connection of individuals, a connection which consists partly in the economic prerequisites and partly in the necessary solidarity of the free development of all, and, finally, in the universal character of the activity of individuals on the basis of the existing productive forces. Here, therefore, the matter concerns individuals at a definite historical stage of development and by no means merely individuals chosen at random, even disregarding the indispensable communist revolution which itself is a general condition of their free development. For philosophers, one of the most difficult tasks is to descend from the world of thought to the actual world.
Language is the immediate actuality of thought.
Just as philosophers have given thought an independent existence, so they had to make language into an independent realm. This is the secret of philosophical language, in which thoughts in the form of words have their own content. The problem of descending from the world of thoughts to the actual world is turned into the problem of descending from language to life. We have shown that thoughts and ideas acquire an independent existence in consequence of the personal circumstances and relations of individuals acquiring independent existence. We have shown that exclusive, systematic occupation with these thoughts on the part of ideologists and philosophers, and hence the systematisation of these thoughts, is a consequence of division of labour, and that, in particular, German philosophy is a consequence of German petty-bourgeois conditions.