

Power changes the mind. Not metaphorically, and not gradually but in specific, measurable ways that alter how senior executives process information, assess risk, and ultimately make the decisions that shape their organisations.
This is not a moral observation. It is a structural one. And understanding it is among the most important and least discussed dimensions of executive leadership. The research on this is consistent. As individuals accumulate positional authority, they become more likely to act on their initial impressions, less likely to fully consider perspectives that contradict their own, and more susceptible to the belief that their judgment is more reliable than the evidence actually supports. They speak more, listen less, and interrupt more frequently in group settings.
They are more likely to anchor on the first piece of information they receive and less likely to update their assessment when new information arrives. None of these changes feel like deterioration from the inside. They feel like confidence, decisiveness, and clarity of direction.
Power does not corrupt judgment immediately. It insulates it slowly, invisibly, and in ways that feel like strength rather than loss. The organisational environment that surrounds senior executives amplifies these effects significantly. Leaders at the top of institutions receive information that has been filtered, summarised, and often without conscious intention shaped to reflect what the organisation believes leadership wants to hear.
They operate in meetings where their stated views carry disproportionate weight and where the social cost of sustained disagreement with them is high. They are surrounded, in many cases, by people who have been selected in part for their ability to work smoothly within the leader's framework rather than to challenge it.
The result is a systematic distortion of the information environment on which strategic judgment depends. A senior executive making a critical decision is rarely working with the same picture of reality that the organisation's frontline employees would describe.
The gap between these pictures between the executive's model of the situation and the situation itself is one of the most reliable predictors of strategic failure. And it grows, quietly and consistently, with time in power and distance from operational reality.
What makes this pattern particularly difficult to address is that the leaders most affected by it are often those with the strongest track records.
Success reinforces the belief that one's judgment is sound. Long tenure creates a deep familiarity with the organisation that feels like insight but can function as a filter, making it harder to see what has genuinely changed.
The executive who has navigated twenty years of difficult decisions has every rational reason to trust their own judgment and that trust, in specific ways, can become the primary obstacle to good judgment. The executive who no longer needs to question their own thinking has not become wiser. They have become more efficiently wrong. The corrective is not self-doubt. Organisations need leaders who can act with conviction and who can sustain direction through uncertainty. The corrective is structural — the deliberate design of decision environments that compensate for the distortions that power reliably produces.
This means building formal channels through which unfiltered information reaches decision-making levels not summaries of what teams think leadership wants to know, but direct access to the operational realities that summaries obscure. It means creating decision processes that require senior leaders to engage seriously with contrary evidence before conclusions are reached, rather than after positions have formed. It means identifying and protecting the individuals in the organisation who are willing to deliver uncomfortable assessments and ensuring their access to leadership is not dependent on the political dynamics that typically determine who gets heard.
It also requires something more personal and more difficult: a practice of deliberate cognitive discipline at the individual level. The executives who navigate power most effectively over time are those who have developed specific habits for examining their own thinking — who treat their initial judgments as hypotheses rather than conclusions, who actively seek the perspective most likely to reveal what they are missing, and who have built relationships outside their formal hierarchy with people who have no incentive to tell them what they want to hear.
None of this eliminates the distortions that power produces. They are too deeply rooted in normal human psychology to be fully overcome by individual effort or organisational design. But they can be substantially mitigated and the leaders and organisations that take this seriously make systematically better decisions than those that do not. Strategic judgment is the most consequential capability a senior executive possesses. Protecting it from the conditions that most reliably degrade it is not a peripheral concern. It is the work that everything else depends on.
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