What is wrong with the world

It seems like in today's society any sense of community is not present. While the need in people to create long-lasting groups that support each other in time of need is present, it doesn't look like people follow-through on it. In result, relationships with people don't feel real on serious, more so coincidental.
My theory is that meaningful relationships are created when two people have a sense that no matter the circumstances, the other one will be there in time of need. However, given the highly dynamic social structures we live in today's day, there is not a opportunity for it: people go to such lengths to help other people because they know they can expect that when they will be in difficult situation, the other person will help them - they expect that the act will be reciprocated. When opportunity for relationship is temporal (for example, when you only have a class with that person for a year), it doesn't feel like the chance for reciprocation is likely to happen, so people don't put an effort in the first place.
In the result of such bonds not forming, people are more anxious and unsure about their future - which causes them to focus more on themselves (since the community won't secure their place in the world, they have to do it themselves) which feeds into the cycle, at the end of which is the future where nobody cares about anything that doesn't involve them - be it community, enviromental issues or politics. The security in the "lower layer" of life (being taken care of) used to enable involvement in higher tiers (taking care of others, in a increasingly wide scale). Combining that with the impact that humanity has on the world, which is larger that ever before, leads to the catastrophe waiting to happen.
Important factor in that mechanism is also the fact that such community-creating behaviors are taught on lesser scale, since there are less people who exhibit them in the first place.