Insurrectionary anarchism is a revolutionary theory, practice, and tendency within the anarchist movement that emphasizes insurrection within anarchist practice. It is critical of formal organizations such as labor unions and federations that are based on a political programme and periodic congresses. Instead, insurrectionary anarchists advocate informal organization and small affinity group based organization. Insurrectionary anarchists put value in attack, permanent class conflict, and a refusal to negotiate or compromise with class enemies.