Emotional intelligence involves the ability to understand and manage one's own emotions and recognize emotions in others. It includes skills such as self-awareness, self-regulation, empathy, and social skills. While IQ is relatively fixed, EQ can increase over time through learning and practice. Emotional intelligence became popular in the 1990s through academic research and was brought to the mainstream by Daniel Goleman's 1995 bestselling book. Developing strong EQ involves competencies in self-awareness, self-management, social awareness, and relationship management.