i agree there s IQ difference between races. There is also EQ difference between them. im Turkish but i wont say my nation is smart, but we are good at finding exploits or practical solutions. we are weak in engineering. on the other hand have high EQ.
in north, scandinavia,germany,denmark etc people who eat more fish and red meat, people tend to have higher IQ. its natural thing, eating red meat and fish makes the brain cells develop more, and generations over generations people transmit such genes.
historically , invention of fire, and hunting and eating animals made us smart.
black people have more muscles as a fact, coz its more of a muscle utilized life style in africa last 6000 years. Not the smartest, but the fittest will survive there.
but this doesnt make anyone superior to other.
in life, there is only one classification, good people, and bad people.