In the ted talk, he doesn't explain why this is not just a correlation. Maybe there is something else that makes you happy and makes one better at having relati

In the ted talk, he doesn't explain why this is not just a correlation. Maybe there is something else that makes you happy and makes one better at having relationships. For exemple, someone who has anxiety disorder will not be good with relationships and most probably will be unhappy. But the root cause of unhappines is anxiety.