You can use arrow keys to navigate in the map.
"Stupidity" is an ambiguous term. People have intelligence in certain things while being completely oblivious in other things.
Intelligence is not genetic and edjucation is many areas of the world is the best it has ever been, leading to more and more well edjucated indivduals.
Genetics is not so much the factor as child rearing is. The way we raise our children is the single most important factor in how successful they'll turn out to be. A child must be thought social skills for example in order to succeed in an educational environment.
Education has gotten better and more widespread, and average IQ cannot change.
Stupidity is subjective and does not define an individual or group. A stupid person is defined by other individuals. Those other individuals do not know all, therefore they are in their own rights stupid. People who cannot nurture a child should make the responsible decision to wait until they can.
Scientists have found that our bodies and our minds have both deteriorated significantly compared to our ancestors