The world is a wonderful place, a cornucopia of good things. For those of us fortunate to be born in reasonable circumstances -- which would include most of the Western world -- there is no reason why we shouldn't have whatever we desire, as long as we're prepared to put in the necessary time and effort.
For those born in impoverished countries the same may not apply and few would have the opportunity to achieve the things their more fortunate cousins can expect.
So darkness and opportunity depend very largely on your birthplace, and on your fortune in winning -- or losing -- the gene lottery.