To see how poor the mental well being the populations of Europe, Canada, or the United States is, only a walk down the street is required. No more research needed. Understanding why, now that takes a lot more work. This research does not prove anything other than to provide a sign post that tells anyone interested in understanding mental well being should spend more time investigating this question. If the hypothesis is that we as a species evolved in small social groups and that as a result collective societies where the community (small groups of people who know each other) are predominant have more mental well being than highly individualistic societies, this research would support that hypothesis. However, it does not prove the hypothesis.