There is no doubt that intelligence as measured by IQ is important, but critical thinking may be more important with making life choices and with being effective on the job. A critical thinker is a good flexible thinker when faced with new problems and who is a skeptic that needs evidence. Critical thinkers are better at overcoming biases in thinking. Researchers who try to measure critical thinking focus on verbal reasoning, argument analysis, hypothesis testing, probabilistic reasoning, and problem solving. This is not what is tested with IQ. So the next time someone tells you a hedge fund manager is intelligent, ask whether he is smart. If given a choice, I want the smart one.