Emotional intelligence is often described as the ability to understand, manage, and use emotions effectively in relationships and decision-making. Few leaders embodied this better than Abraham Lincoln. One of the most powerful examples of emotional intelligence in action comes from Lincoln’s unlikely partnership with Edwin Stanton, a man who once insulted and dismissed him but later became his most trusted ally. Their story shows how emotional intelligence can transform conflict into collaboration—and why these lessons remain essential for leaders today.

Emotional Intelligence Lesson #1: Building Radical Trust

When Lincoln appointed Stanton as Secretary of War, many doubted the decision. Stanton had publicly mocked him and often criticized his leadership style. Yet Lincoln trusted Stanton enough to let him overrule presidential orders if necessary. This remarkable act of humility and trust demonstrates one of the core pillars of emotional intelligence: knowing when to empower others. By embracing Stanton’s strengths instead of resisting his criticism, Lincoln built a foundation of trust that helped guide the Union through the Civil War.

Emotional Intelligence Lesson #2: Practicing Radical Self-Awareness

Emotional intelligence requires deep self-awareness—the ability to recognize when pride or ego gets in the way of progress. Lincoln mastered this by setting aside personal grievances with Stanton and focusing on what was best for the country. Instead of seeing Stanton as a rival, he viewed him as an ally with complementary strengths. This willingness to rise above personal insult and choose collaboration over ego is a timeless leadership skill that leaders today can learn from.

Emotional Intelligence Lesson #3: Expressing Trust and Vulnerability

Another hallmark of emotional intelligence is the ability to openly express appreciation and vulnerability. Lincoln often praised Stanton publicly, even when others criticized him. By calling Stanton “the rock on the beach of our national ocean,” Lincoln not only reinforced Stanton’s value but also strengthened their bond. This lesson reminds us that emotional intelligence isn’t about avoiding conflict—it’s about expressing trust, recognizing others’ contributions, and turning difficult relationships into sources of strength.