Both insurrectionist and mass anarchism are faced with a series of difficult challenges. In this chapter, we explore syndicalism in more depth, addressing ourselves to several critical issues: how can a syndicalist union avoid evolving into orthodox unionism, which focuses solely on immediate issues, and typically develops large and moderate bureaucracies? If anarchism is about the emancipation of the popular classes as a whole, how can syndicalism address the needs of those sectors of the working class and peasantry that are outside wage labour? Finally, assuming a revolutionary general strike takes place, can syndicalism effectively deal with the threat of armed counterrevolution?