IQ puzzle

Disease has recently been implicated as the cause of IQ differences across countries. There are many problems with this observation. First, IQ is not a robust or absolute measurement. It suffers from the bias of those who design and measure it. If you go to a more fundamental definition of IQ – the ability to survive under adverse conditions by adaptation – it will totally change the picture. After all, the primary objective of biological systems, including humans, is survival. Philosophy...