A strong, homogenous culture solves public trust problems (which are special cases of the prisoner&#x27;s dillema problem.)<p>Multiculturalism destroys social trust.  America is the most culturally diverse western nation, ergo it has the lowest public trust.  As America continues to diversify, and in as much as Europe does so, we can expect social trust to continue to decline.<p>See <a href="https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;Robert_D._Putnam" rel="nofollow">https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;Robert_D._Putnam</a>