Even at a psychological level human beings move towards pleasure and away from pain. The desire to be happy is inherent in all people, essence aside conventionally here people:)
Number 1 Cause of suffering = misalignment of a unified happiness
Very few people have a notion of what unified happiness looks like. Majority of problems with the world are that one person’s happiness or pursuit there of conflicts with another. So then it moves towards survival of the fittest, or best suited to join together to make each other happy. That’s truly the only option many see.
What does a unified world of happiness look like?