Fifteen years ago, psychologist and educator Howard Gardner introduced the idea of multiple intelligences, challenging the presumption that intelligence consists of verbal or analytic abilities only--those intelligences that schools tend to measure. He argued for a broader understanding of the intelligent mind, one that embraces creation in the arts and music, spatial reasoning, and the ability to understand ourselves and others.Today, Gardner's ideas have become widely accepted--indeed, they have changed how we think about intelligence, genius, creativity, and even leadership, and he is...