Final answer:
The book, Bowling Alone, by Robert Putnam points out a decline in social capital during the latter part of the 20th century.
Step-by-step explanation:
The subject of the question is the decline in social capital during the latter part of the 20th century, as noted in Robert Putnam's book, Bowling Alone. Social capital refers to the connections, relationships, and networks formed through participation in social groups. Putnam observed a decline in people adhering to evangelical religions, participating in regular social groups, and adhering to moderate political beliefs.
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