There is almost nothing more important to understand about people than intelligence. It can be measured more accurately than anything else in the social sciences. It differs tremendously and importantly between individuals. It is the single most important determinant of life success. It's very existence, however, remains subject to substantive debate, most of it highly politicized. Dr. Richard Haier has recently written a major book on the topic, Learn more about your ad choices. Visit podcastchoices.com/adchoices