2) Having a higher IQ protects you from death
This is an uncomfortable one: According to the research, people with high IQs tend to be healthier and live longer than the rest of us. This graph represents
a study of 1 million Swedish men. The researchers found a threefold difference in the risk of death between the those with the highest IQs and those with the lowest.
There are a few interrelated reasons why this may be. One is the fact that people with higher IQs tend to make more money than people with lower scores. Money is helpful in maintaining weight, nutrition, and accessing good health care.
It could also be that people with higher IQs are smart enough to avoid accidents and mishaps. There's actually some evidence to support this: Higher-IQ people are less likely to die in traffic accidents.