Only if you believe in the Flynn effect and you are willing to extrapolate backwards and infer that Western populations were border-line retarded then and were of comparable levels to other populations now.
The Flynn Effect is borne out by data. Are you saying you -don’t- believe in it, and if not, on what grounds?
(Note that an average IQ of 80 doesn’t imply borderline-retarded people, provided, as suggested by the correlation between improving literacy and improving IQ, that IQ is partially some form of trainable skill.)
The Flynn Effect is borne out by data. Are you saying you -don’t- believe in it, and if not, on what grounds?
(Note that an average IQ of 80 doesn’t imply borderline-retarded people, provided, as suggested by the correlation between improving literacy and improving IQ, that IQ is partially some form of trainable skill.)