Who is Americans in the Last Half of the Twentieth Century from Bowling Alone and what is their importance?

Putnam shows that social capital has declined in the last half of the twentieth century. Americans are participating less in civic and other organizations. The decline in social capital has led to more health problems, including an increase in suicide and depression. Americans are also experiencing more social isolation from each other and more loneliness. Individuals are spending more time in solitary activities, such as watching television and commuting long distances to work each day.