When we think of great leaders, certain characteristics come to mind: They have confidence in their abilities and conviction in their beliefs. They “trust their gut,” “stay the course,” and “prove others wrong.” They aren’t “pushovers,” and they certainly don’t “flip-flop.” But this archetype is terribly outdated. Having spent three years studying many of the world’s most successful leaders for my new book, Persuadable, I’ve learned one surprising thing they have in common: a willingness to be persuaded.