I have watched leaders make their worst decisions at the exact moment they felt most decisive. Something blows up; options narrow; action feels obvious. You move fast, with the quiet conviction that this is exactly what the moment requires.
That feeling is not wisdom.
What I want you to consider this week is that the certainty is biology playing its oldest trick; it is the precise state in which your brain is least equipped for the decision you are about to make.
In November 2023, Satya Nadella found out that OpenAI, the company Microsoft had invested 13 billion dollars in, had just fired its CEO Sam Altman. He found out roughly one minute before the rest of the world did. He was furious, the share price was dropping, and the temptation to fire back publicly was enormous. He did not. He paused, consulted his leadership team, and weighed his options before moving on any of them. Within 48 hours he had announced he would hire Altman directly into Microsoft; within days, Altman was back at OpenAI on Nadella's terms. Frances Frei at Harvard Business School called it a masterclass.
Here is the mechanism. Your nervous system is brilliant, but it evolved to outrun lions, not to chair board meetings. Acute stress triggers changes designed to reduce cognitive complexity; it narrows options, accelerates action, and bypasses reflection. Arnsten's work at Yale shows that even mild acute stress causes rapid loss of prefrontal function, the very region you need for nuanced decisions. A 2025 study in Nature's Communications Psychology found that when stress combines with time pressure, decision quality drops significantly. Under stress, you become more certain and sometimes, more wrong at the same time. Your body has mistaken the boardroom for a woolly mammoth.
Here is the part most leadership writing gets wrong. The activation is not the enemy; it is information. Stress fires in proportion to perceived stakes, so it is pointing at something real. Damasio's somatic marker research was clear that the body's signals are integral data, not noise. So the work is not to calm down. It is to notice. Lieberman's UCLA research found that simply naming an emotional state measurably reduces amygdala activation and restores prefrontal function. Saying "I notice I'm a little wired right now" is itself the neurological intervention. That is what Nadella was doing that weekend; not performing calm, but noticing the mammoth before he chased it.
Under stress, you become more certain and more wrong at the same time.
The one thing
Name the mammoth before you chase it
Next time you feel that sharp certainty, the one that says "leave it to me, I know exactly what to do, I need to act now," pause for sixty seconds. Say one sentence, silently or aloud: "I notice I'm a bit wired right now." Then ask one question: "What am I not seeing, because my body is getting ready to chase a mammoth?" Then make the call. It might be 60 seconds slower; it will be better.
The version of you that feels most decisive might be the version with the least information available. You do not lose urgency by pausing; you recover the part of your brain that can tell a board crisis from a mammoth.