There's ample conversation in the linked paper about how the many demands of society and changing culture influence IQ. The reality is that its one of the few

There's ample conversation in the linked paper about how the many demands of society and changing culture influence IQ. The reality is that its one of the few psychometrics with strong correlations to a number of long term outcomes like income, wellbeing, crime, fertility, etc., and which is responsive to changes in the environment and demographics of a nation. That said there is a point to be made that IQ is clearly not 1:1 with everything we think of as 'intelligence'. Trivially, most significant accomplishments take place over months or years as opposed to the minutes or hours of an IQ test. However, using it as a useful tool isn't as reductive as dismissing it entirely simply because it isn't a completely perfect or comprehensive metric.