Why the level of happiness is very high in extremely cold countries, of all places, may have something to do with the fact that extreme weather situations tend to make people more empathetic towards each other. Whereas heat has been shown to promote aggression, the cold appears to bring people closer together. In extremely cold conditions, people are more generous and helpful towards homeless people, for example. According to studies, climate-related natural catastrophes usually also cause people to pull together and help each other in times of need. While the weather hardly seems to affect our general happiness at all, it does have an effect on our personality. And it makes sense that we feel happier when we are more generous and caring, rather than aggressive, towards other people.