Share the same observations and worries as you do. It is a question I find myself asking an age where globalization is continuing at a rapid pace, and where the mobility of people increase (so not only are we living in communities with more people, we also see new people move in and out of the community much quicker and thus have less reason to expect that those we interact with will be there to repay the favour, or that their increased education or well-being will benefit the community you live in long-term):

Whether we on the basis of these observations would be better of returning to a more community-based living, or if taking on this challenge in order to overcome it is what will allow us to take new great steps as a civilization.