Stupidity is an indiscriminate privilege of all human groups, irrespective of race, class, creed or level of education (including Nobel laureates). It is uniformly distributed according to a constant proportion.
Development of intellect is conditioned by development of senses that mediate information. Such knowledge reflects in imagination and leads to abstract thinking. This process is conditioned by sufficient amount of positive impulses from the environment.
According to a 2014 report released by the National Science Foundation, 26% —a quarter —of the U.S population believes that the Sun revolves around the Earth. In the same survey, 39% of Americans believe in the Big Bang Theory, and only 48% believe in Evolution. This deficiency in scientific knowledge might sound alarming, however Americans made out better on several of the questions than did the Chinese and European populations that took part in a similar, although slightly older, poll. In 2005, the European Union put out a survey where only 66% of Europeans answered the basic astronomy question correctly. Fortunately, both China and the EU managed considerably better (66% and 70%) on the question of human evolution.