Emotional intelligence (EI) refers to the ability to perceive, manage, evaluate, and use emotions. Broadly speaking, emotional intelligence addresses the emotional, personal, social, and survival dimensions of intelligence, which are often more important for daily functioning than the more traditional cognitive aspects of intelligence. The concept of emotional intelligence has brought new depth to the understanding of human intelligence; it enhances the ability to evaluate one's general or overall intelligence.This chapter examines the current state of emotional intelligence by comparing various models and approaches, as well as exploring the existing neurological evidence.