> Dozens of painstaking studies... have established beyond reasonable doubt that ... [t]he more integrated we are with our community, the less likely we are to experience colds, heart attacks, strokes, cancer, depression and premature death of all sorts...
> ... the positive contributions to health made by social integration and social support rival in strength the detrimental contributions of ... risk factors like ... smoking, obesity, elevated blood pressure, and physical inactivity.
> ...as a rough rule of thumb, if you belong to no groups but decide to join one, you cut your risk of dying over the next year in half.
Putnam was surveying a large number of studies, not just the Harvard one.
 Putnam, Robert D, Bowling Alone: The Collapse and Revival of American Community; https://www.amazon.com/Bowling-Alone-Collapse-American-Commu...
Yea, a book that overs this is:
"Bowling Alone: The Collapse and Revival of American Community"
You may still believe in the benefits of diversity, but there are also costs. One of them is that little kids can't ride American subways alone.
seems to me like school is the great melting pot of our society,
now that I'm out of school it seems like I live a very Bowling Alone (http://www.amazon.com/Bowling-Alone-Collapse-American-Commun...) existence, I interact with people at work, and family, it seems like that is the exent of my non superficial interactions
maybe I'm paticularly introverted, but I wouldn't home/unschool my daughter simply because I don't want her social universe to be that small
also schooling is one of the few shared experiences in our society
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