“Connective talents are useless, of course, if people can’t perform the work. And the most talented people in every occupation have huge advantages over their ordinary peers. Dean Keith Simonton, who studies greatness and genius, finds that whether it comes to songwriters, composers, scientists, programmers, or filmmakers, the top 10 percent generate as much or more output than the other 90 percent. The superiority of great bosses is seen in a summary of eighty-five years of research on employee selection methods. Frank Schmidt and John Hunter found that the top 15 percent of professionals and managers produced nearly 50 percent more output than their average peers. The strongest predictors of performance included general mental ability (IQ and similar measures), job sample tests (having people prove they can do the work), and evaluations by peers; other useful predictors included structured employment interviews (where each candidate is asked the same questions in the same order) and conscientiousness (self-discipline and follow-through, similar to grit). These findings provide ammunition for bosses who stock up on the best talent and believe that little else is required. Yet without constructive connections among people, collective performance and humanity is tough to achieve – no matter how many superstars are in the fold.”