The document discusses the history and models of emotional intelligence. It describes early theories from Darwin, Thorndike, and Stern that linked emotions to survival, social intelligence, and ability to understand others. Salovey and Mayer's 1990 model defined EI as ability to identify, assess and control one's own and others' emotions. Goleman's 1998 model emphasized EI as a wide array of competencies that drive leadership performance, including self-awareness, self-management, social awareness, and relationship management. The document also outlines five key abilities of EI: managing stress, recognizing emotions, connecting with others non-verbally, using humor, and resolving conflicts positively.