Putnam has argued, in particular, that last several decades saw lower levels of trust in government, lower levels of civic participation, lower connectedness among ordinary Americans, and lower social cooperation.
This is a puzzling development, because from its inception the American society was characterized, to an unusual degree, by the density of associational ties and an abundance of social capital. Almost 200 years ago that discerning observer of social life, Alexis de Tocqueville, wrote about the exceptional ability of Americans to form voluntary associations and, more generally, to cooperate in solving problems that required concerted collective action. This capacity for cooperation apparently lasted into the post-World War II era, but several indicators suggest that during the last 3-4 decades it has been unraveling.
http://peterturchin.com/cliodynamica/strange-disappearance/
This is a puzzling development, because from its inception the American society was characterized, to an unusual degree, by the density of associational ties and an abundance of social capital. Almost 200 years ago that discerning observer of social life, Alexis de Tocqueville, wrote about the exceptional ability of Americans to form voluntary associations and, more generally, to cooperate in solving problems that required concerted collective action. This capacity for cooperation apparently lasted into the post-World War II era, but several indicators suggest that during the last 3-4 decades it has been unraveling.
http://peterturchin.com/cliodynamica/strange-disappearance/