I highly recommend watching this: https://www.ted.com/talks/james_flynn_why_our_iq_levels_are_higher_than_our_grandparents?language=en https://www.ted.com/talks

I highly recommend watching this: https://www.ted.com/talks/james_flynn_why_our_iq_levels_are_higher_than_our_grandparents?language=en https://www.ted.com/talks/james_flynn_why_our_iq_levels_are_... Flynn believes that the rising IQ scores over the generations are due to us dealing better with abstractions and using logic on these abstractions.