His most famous (and controversial) work, Bowling Alone, argues that the United States has undergone an unprecedented collapse in civic, social, associational, and political life (social capital) since the 1960s, with serious negative consequences.
Hans mest berømte (og kontroversielle) værk, essaybogen Bowling Alone, argumenterer for at USA har undergået et hidtil uset kollaps i social kapital siden 1960'erne, med en række negative konsekvenser til følge.