Marxists offer a caveat to the role of social classes in political change. Instead of agents of democratization, Marxists consider the labour movement to be the agent of social revolution. They postulate that workers will create networks and unite for revolutionary change. Lenin in Russia, Mao Tse-tung in China and Ho Chi Minh in Vietnam, led social revolutions based on the mobilization of peasants. By doing so, they showed that peasants, while often powerless and unable to organize, occasionally have engaged in large-scale political action. But revolutions are rare, and we should certainly be cautious of generalizing about the ability of either workers or peasants to generate and produce such profound change.