Emotional intelligence or EI is the capacity to understand and control your own emotions, and those of the people you interact with every day. People with a high degree of this aspect of their makeup understand their feelings, what their emotions represent, and how those emotions can influence other people. EI is critical to all leaders to help ensure success. Leaders who are able to control their emotions are more likely to be great leaders. This aspect of leadership includes five key elements: Self-awareness, self-regulation, motivation, empathy and social skills. Leaders who are able to control each aspect of their emotions have a higher level of emotional intelligence.