Some of the strongest bonds in our society are formed by people who march together in military units, as William McNeill, the historian, has pointed out. Members of orchestras and performing groups today likewise develop bonds. As Frank Zappa told me years ago, playing music with other people can be more intimate than any other activity. The turn-taking and accommodation involved call for great amounts of empathy and generosity.
Hmm. By this logic, the strongest bonds of all must be formed in… marching band!