Worldwide, IQs have risen by up to three points per decade over the past century. Known as the Flynn effect, the rise means IQ tests should be recalibrated regularly.
Our ancestors were just as good as we are at practical intelligence, at dealing with everyday life. But our brains and minds have changed over the last century. That is when all these IQ gains have taken place, and we have developed the mental skills needed to deal with the demands of the modern world. Learn more here.