“For just as the worker cannot be indifferent to the economic conditions of his life in existing society, so he cannot remain indifferent to the political structure of his country. Both in the struggle for his daily bread and for every kind of propaganda looking toward his social liberation he needs political rights and liberties, and he must fight for these himself in every situation where they are denied him, and must defend them with all his strength whenever the attempt is made to wrest them from him.”