The instinct to dominate a disagreement is evolutionary. In ancestral environments, losing social standing could be fatal. Your brain treats a challenge to your opinion as a challenge to your survival, triggering the same fight-or-flight response as a physical threat.

But in modern life, this wiring backfires. Productive disagreement requires exactly what your amygdala is trying to prevent: lowering your defenses and genuinely considering that you might be wrong. The people who disagree well are not less emotional — they have trained themselves to notice the defensive surge and choose a different response.