Robert Putnam's 1995 article "Bowling Alone" discusses declining social capital in America. Putnam defines social capital as social networks and trust between people. He finds decreasing membership in groups like churches, unions, and PTAs. Fewer people know their neighbors or socialize with them. Trust in government and institutions is also down. However, professional groups and interest organizations are growing. Putnam later works to restore social capital through community projects bringing people together. Critics argue social capital has downsides and technology may now foster online networks.