There is a field of study called βhappiness research,β which tries to analyze what makes people happy. Prof. Michael Hagerty of the University of California at Davis surveyed decades of international happiness research and found that βfor the most part, the top-rated countries are small and homogeneous.β As he explained, such countries βhave a similar world view and a similar religion, so that itβs easier for them to communicate and to understand each otherβs motives.β He also noted that βthey donβt have race problems.β In the conclusion of his 148-country diversity survey Tatu Vanhanen wrote, βIt is easier to establish harmonious social relations in ethnically homogeneous societies than in ethnically divided ones because people are more helpful towards each other in ethnically homogeneous societies.β There can, of course, be many different kinds of division in a country: language, religion, race, class, etc. However, of all these, race seems to be the most difficult to bridge.