I upvoted for insightfulness, and I'm definitely all for not living everyday life like a war, but I'm not sure that the decline of friendship is a good thing. The evidence seems pretty compelling that a lack of good friendships causes unhappiness. For example, religious people tend to be happier than atheists because they have a much easier time making friends, through church: http://www.suntimes.com/news/2728257-418/church-religious-ha...
Perhaps human psychology is conditioned to expect having a few war buddies in its network, similar to how human physiology is conditioned to expect a great deal of physical movement. (http://www.businessinsider.com/sitting-can-kill-you-2011-4)
Perhaps human psychology is conditioned to expect having a few war buddies in its network, similar to how human physiology is conditioned to expect a great deal of physical movement. (http://www.businessinsider.com/sitting-can-kill-you-2011-4)