Emotional intelligence, usually shortened to EQ, is the capacity to recognize, understand and manage your own emotions while also reading and influencing the emotions of others — and among leaders it turns out to matter more than raw IQ. Two managers can have identical resumes, the same MBA, the same technical fluency, and lead teams that perform on entirely different levels. Psychologist Daniel Goleman spent decades studying why, and his research reshaped how organizations think about leadership: the deciding factor is rarely intelligence alone.

The concept itself was formalized by psychologists John Mayer and Peter Salovey in 1990, but it was Goleman’s 1998 Harvard Business Review article “What Makes a Leader?” that made the case to the business world — that the most effective leaders are distinguished not by strategic brilliance alone but by a high degree of emotional intelligence.

The five components Goleman identified

Goleman broke emotional intelligence into five parts: self-awareness (knowing your own strengths, weaknesses and emotional triggers), self-regulation (managing disruptive impulses, especially under pressure), motivation (a drive to achieve for its own sake), empathy (accurately reading what others are feeling) and social skill (using that awareness to build relationships and move people toward a goal). None of these are personality traits fixed at birth — Goleman’s research treated them as learnable competencies, which is precisely why companies started training for them rather than simply hiring for them.

Why the first one is harder than it sounds

Self-awareness turns out to be the hardest of the five to actually possess, and it’s also the one people are most confident they already have. Research highlighted by Harvard Business School Online found that while roughly 95% of people believe they are self-aware, only about 10 to 15% actually meet that bar when tested. That gap matters because every other component in the model builds on top of it: a leader can’t regulate an emotion they don’t recognize, and can’t read a room accurately while misreading themselves — which is why a leader’s blind spot here can cut a team’s success in half.

Why it matters enough to show up in hiring

The business case isn’t just anecdotal. Surveys cited by Harvard Business School Online found 71% of employers now weigh emotional intelligence over technical skill when hiring for leadership roles, and leaders who score high on empathy have been shown to perform roughly 40% better on coaching and decision-making. There’s a physiological reason emotion moves that fast through an organization: McKinsey research on leadership under stress found that humans detect other people’s emotional states in as little as 8 to 40 thousandths of a second, meaning a leader’s anxiety or calm spreads through a team almost instantly, often before a single word is spoken. A tense leader can make a room tense without saying anything at all.

How leaders actually build it

Because Goleman frames EQ as a set of competencies rather than a fixed trait, the practical advice is less about temperament and more about habits: soliciting honest feedback to close the self-awareness gap, pausing before reacting in high-stakes moments, and treating empathy as a discipline of active listening rather than something people either have or don’t. There’s a physical dimension to this too — McKinsey’s research found that stress narrows peripheral vision from roughly 180 degrees down to about 30, which is part of why emotionally resilient leaders deliberately protect recovery time, sleep and calm relationships as tools for staying clear-headed when it counts, not as unrelated lifestyle habits.

None of this makes technical skill irrelevant, and Goleman never argued that it should. His point was narrower and, for most organizations, more useful: technical skill and IQ tend to get someone into a leadership role, but they don’t reliably predict whether that person can hold a team together under pressure, retain good employees, or make a calm decision when a room full of people is looking to them for one. The leaders who outperform their equally qualified peers are usually the ones who learned to manage what’s happening inside themselves before trying to manage what’s happening around them.