One think that can lead to loneliness is material abundance namely the abundance of houses. Here in Portugal we have 40% more houses than families. For instance the building that I live has 8 apartments and it was build 60 years ago. I have some neighbors that live here since the beginning. They told me there was a time it had 50 residents. Now there are only ten residents. We are so surrounded by abundance that we are more and more apart from each other. But we cannot stop building houses because that would mean less jobs and the end of economic growth.