David sits down with Tim Spiker, author of The Only Leaders Worth* Following: Why Some Leaders Succeed, Others Fail, and How the Quality of Our Lives Hangs in the Balance. The book is guided by the principle of Who* Not What, which is that ¾ of a leader’s effectiveness is determined not by what they do, but by who they are. Tim describes the findings in his book as the “accidentally-discovered and rarely-leveraged truth within leadership.”