Flynn makes some interesting points throughout the discussion, including the following thoughts on the interaction between the economy and IQ:
One of the big surprises is that Scandinavia, the IQ gains tailed off towards the end of the last century and many of us thought and I had an open mind that that would mean that they would tail off in the rest of the developed world. Well, three data sets are in now from America, Britain and Germany and they haven’t. They seem to be humming along on the Wechsler tests, you know the WISC and the WAIS, at just about three points per decade. We’re in the 21st century a decade now and there they still are.
And this revises one’s calculations a bit. I’d thought the 21st century would see the developing world catching up. Well it is because their gains are going even faster. It will be tougher to catch up than I thought. I think it’s wrong to look at the developing world in isolation from what’s going on there economically because IQ rises with modernity. Lynn and many others make the mistake of sort of thinking that you have to leap from an IQ of 70 to 100 and then you modernize. Well, it’s like going up a ladder. You gain a bit in terms of the modern mindset, you modernize the economy a bit and then you go up again, you know, slowly.
In this scenario, there can be some strong benefits to IQ enhancing policy interventions as it can set the population into the virtuous circle of modernisation and IQ gain.