Dysgenic Reactions¶
Michael A. Woodley, Jan te Nijenhuis, and Raegan Murphy respond (in detail) to critics of their 2013 paper on the dysgenic implications of Galton’s reaction time data. Their adjusted evidence indicates an increase in reaction times among US/UK males over the period 1889-2004 from 187.1 ms to 237.1 ms (44.6 ms over 115 years), equivalent to a decline in g of 13.9 points, or 1.21 points per decade. They propose that 68% of this decline is due to dysgenic selection, with the remaining 32% attributed to increasing mutation load.
If these figures are even remotely accurate, they portray a phenomenon — and indeed a catastrophe — that would have to be considered a fundamental determinant of recent world history. Given the scale and rapidity of dysgenic collapse suggested here, skepticism is natural, and indeed all-but inevitable. (The proposed rate of decline seems incredible to this, radically inexpert, blog.) It should nevertheless be reasonable to expect counter-arguments to exhibit the same intellectual seriousness and respect for evidence that this paper so impressively demonstrates.