Péter Ambrus is a Hungarian sociologist. His research focuses on the sociology and cultures of poverty. In his explorations of the difficulties faced by marginal groups and the ways of tackling them, Ambrus reveals the inability of the socialist state to come to terms effectively with social exclusion and poverty. Giving voice to marginalized people like the poor, sexual minorities, or the Roma, Ambrus developed a criticism of official socialism, which helped him engage in socially committed activism.