Hierarchy and Life Satisfaction

A graph from the paper

People live happier in the Northern countries of Europe than in the Latin countries. This difference in happiness is paralleled by a difference in degree of social hierarchy; Latin countries are more hierarchical and probably so because feudalism has been more prominent in their history. The negative correlation between happiness and hierarchy is likely to reflect a causal effect, humans being hierarchy averse by nature.

Source: Brule & Veenhoven (2012). 
HT: Matthew Baker.