There is extremely strong evidence for a genetic basis to intelligence: http://en.wikipedia.org/wiki/Heritability_of_IQ http://en.wikipedia.org/wiki/Heritabilit

There is extremely strong evidence for a genetic basis to intelligence: http://en.wikipedia.org/wiki/Heritability_of_IQ http://en.wikipedia.org/wiki/Heritability_of_IQ Though other factors come into play, environment, education, etc., we are not all gifted with the same faculties, and it is ignorant to claim otherwise.