Where I live, a vast majority (98-ish percent) are white people. Scandinavia is the place man moved to from central Europe over a period of tens and thousands of years. The white skin simply made white people get better adopted to the cold environment.

Over the past few hundreds of years, people all over the world have immigrated to half of everywhere. White people went to Africa, the Americas, Australia, just llike other ethnicities went to most places around the world. Anyway, recently, scientists proved that changing the natural environment over such a short period of time causes certain problems, both psychologically and mentally. The lifespan of the creatures is shortened when exposed to a different environment, and various strange behaviour is boosted. Cutting, suicide and murder are all extremely rare events over here. The US, however, offers a challenging environment for "newcomers" of only a few hundred years. It's too hot for white people, too cold for black, too... Well, you get the idea. Think about it, why are Indians slightly red-tinted? America is their natural environment.

Until the US population has adapted more to the enviroment (in maybe a bit over 10,000 years), your skin could be red-tinted and the reckless acting, cheating, suicides and cutting rates could go down tremendously. Just a bit of an input from the Darwin side of view.

"Stephen Wolfram is the creator of Mathematica and is widely regarded as the most important innovator in scientific and technical computing today." - Stephen Wolfram