" 1. The clear and quantitative physical differences among people in size,
strength, speed, agility, coordination, and other physical attributes that
translates into some being more successful than others, and that at least
half of these differences are inherited.
2. The clear and quantitative intellectual differences among people in
memory, problem solving ability, cognitive speed, mathematical talent,
spatial reasoning, verbal skills, emotional intelligence, and other mental
attributes that translates into some being more successful than others,
and that at least half of these differences are inherited. "

― Michael Shermer , Brain, Belief, and Politics (Cato Unbound Book 92011)