Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. The term “emotional intelligence” (EI) is defined as the ability to perceive, control and evaluate emotions. According to some researchers emotional intelligence can be learned and strengthened. Nevertheless, other scientists believe that it is an inborn feature. In the 1990s, Peter Salovey and John D. Mayer, two leading researchers on emotional intelligence, defined emotional intelligence as “the subset of social intelligence that involves the ability to empathize with people”. It is generally agreed that emotional intelligence can help a person build stronger relationships, succeed at work, and/or achieve a successful career. Learn more about emotional intelligence and its correlation to intelligence quotient (IQ) by reading this book.