This document discusses emotional intelligence and its importance. It defines emotional intelligence as the ability to recognize and manage one's own emotions and the emotions of others. The document summarizes five key research studies that show individuals with higher emotional intelligence demonstrate better job performance, leadership skills, and sales outcomes compared to those with lower emotional intelligence. For example, one study found insurance sales agents with stronger emotional competencies sold policies worth twice as much in annual premiums as weaker agents. Overall, the research suggests emotional skills are very important for success in complex jobs and account for about two-thirds of the difference between top performers and average ones.