Leadership effectiveness is a relational property. It does not reside in the individual alone, in the way that height or IQ or extraversion does. It emerges from the interaction between a person and a specific organizational situation - the ownership structure, the governance arrangements, the business cycle position, the informal authority architecture, the specific challenge the organization faces at the moment leadership is required. The same individual, placed in two different situations, will produce different outcomes. That variation is not random. It is predictable from the characteristics of the situation, and the research that demonstrates this has accumulated across multiple decades and multiple disciplines without substantially changing how organizations make leadership appointments.
The core finding is straightforward to state and demanding to accept. Effectiveness is not portable in the way the dominant selection model assumes. The question is not whether an individual has the capabilities that generally predict strong leadership outcomes. The question is whether they have the specific capabilities that this situation, at this moment, actually requires. These are related questions, but they are not the same question, and answering the first does not answer the second.
Why has this finding been underweighted in practice? The practical reasons are more compelling than the theoretical ones.
Defining what a specific situation requires is harder to do than measuring individual capability. It demands a structured analysis of the organizational context before the assessment process begins - a prior step that most selection processes skip entirely, moving directly to candidate evaluation without having specified what the context demands of whoever takes the role. That prior step requires judgments that are less comfortable than a competency rating: judgments about where the organization is in its development, what the ownership structure implies for leadership style and decision authority, what the incoming leader will face in the first twelve months that is specific to this situation and not generic to the role category. These judgments are harder to defend. They require people in the process who understand the context well enough to specify its demands - which is not always who sits on the selection panel.
There is a second reason. If effectiveness is relational, then responsibility for a leadership failure is shared between the individual and the organization that placed them in the wrong situation. That is a less comfortable conclusion than individual failure. It implicates the board that made the appointment, the search process that shaped the shortlist, the framework that defined the criteria. Organizations that have invested heavily in selection infrastructure are not predisposed to conclude that the infrastructure is asking the wrong question. They are predisposed to conclude that it needs to be applied more rigorously. The investment in more structured interviews, more comprehensive psychometric assessment, a more carefully designed competency framework follows directly from this logic. It addresses the symptoms without touching the cause.
The finding has been underweighted not because it is obscure but because accepting it requires changing something more fundamental than the tools.
Effectiveness is not portable in the way the dominant selection model assumes.
The category error reproduces itself across three distinct frameworks, each operating at a different level of the organization. Each gets something genuinely right. Each carries the same foundational mistake.
Personality assessment operates at the individual level. The insight behind it is real: people have stable individual differences in how they process information, make decisions, relate to others, and respond to pressure. These differences are observable, they persist across situations, and understanding them has genuine value for self-awareness, team composition, and communication. The most widely used models have identified meaningful patterns in how individuals differ, and that contribution should not be dismissed.
The error is in what personality assessment is then asked to do. When it is used to predict leadership effectiveness in a specific organizational context - when a particular profile is treated as evidence that someone will lead well in this situation - the tool is being applied beyond its design. Personality mediates how a leader behaves, but it does not determine whether that behavior is what the situation requires. A high-drive, extraverted executive may be exactly what a PE-backed company at a value creation inflection point needs, and exactly the wrong profile for a family business navigating a sensitive succession. The personality is the same. The situation determines whether it is an asset or a liability.
Generic competency models operate at the organizational level. The insight behind them is also real: some capabilities do predict strong leadership performance across a wide range of situations. The ability to think strategically, to build and develop people, to drive execution, to communicate with credibility - these matter in most leadership roles. Defining them explicitly, assessing candidates against them consistently, using them to create a shared evaluation language across the selection panel: each of these produces better decisions than impression-based assessment. The contribution is genuine.
The error is in the level of abstraction at which the competencies are defined. Generic competency models are designed to apply across organizational contexts, which means they are defined at a level of generality that makes them always relevant and never precise. "Drives results" is a competency that every organization wants from its leaders, defined in a way that applies to every leadership role. It cannot tell you what driving results requires from the leader of a listed company under activist shareholder pressure versus the leader of a family business that has never had a formal performance management system. The capability sounds the same. The specific behaviors, relationships, and judgment calls it demands are entirely different. The competency model has no mechanism for capturing that difference, because it was designed not to - specificity would destroy its portability.
The skills-based organization movement operates at the systems level, and it represents the most recent iteration of the same error. The insight is its most compelling feature: breaking roles down into specific skills rather than credentials or job titles identifies capability that traditional assessment misses and creates a more honest account of what organizations actually need from people. These are genuine contributions.
The error, again, is in the portability assumption. Skills are treated as context-independent units of capability: if you have the skill, you can apply it. But what a skill requires - what it looks like in practice, what judgment it demands, what relationships it depends on - shifts with the context. The ability to lead organizational change looks entirely different at a Nordic mid-cap company navigating its first post-IPO restructuring than at a PE-backed business executing a value creation plan on a three-year timeline. Treating it as a portable skill obscures the contextual variation that determines whether it will be sufficient.
Each of these frameworks gets something right. None of them captures what determines whether a leader will be effective in a specific situation, because none of them was designed to. They were designed to assess individuals. What they are missing is a prior analysis of what the situation requires.
The category error, in all three manifestations, sits upstream of the assessment process itself. The sequence is the error. Organizations define what they want from a leader by consulting previous role descriptions, generic frameworks, and the impressions of whoever sits on the selection panel - and then they assess candidates against those criteria. The question of what this specific situation actually requires, defined with the same rigor applied to candidate assessment, is not systematically asked.
When the sequence is reversed - when context analysis precedes candidate analysis, when the demand profile is specified before the shortlist is formed - the assessment process answers a different question. It is no longer asking who is most capable in the abstract. It is asking whose capability profile best matches what this situation requires at this moment. The tools are largely the same. The criteria are derived from the context rather than from a generic framework. The evaluation at the end is a fit judgment rather than a ranking.
That reversal is not a minor adjustment. It requires a structured account of the organizational context - the ownership dynamics, the business cycle position, the governance architecture, the specific inflection point the incoming leader will face - before any candidate is assessed. It requires people in the process who understand the context well enough to specify its demands. And it requires accepting that the selection process is responsible for analyzing the relationship between a person and a situation, not just the person.
What that analysis looks like depends entirely on the organizational context. The demands placed on a leader in a PE-backed company at a value creation inflection point are not the demands placed on a successor in a family business, or on an executive appointed to lead a listed company under shareholder pressure, or on the professional leader brought in to scale a founder-built organization. These contexts differ in ways that are structural and predictable. They produce different failure patterns for the same reason: the demand profile was never specified, so the mismatch was never identified.
What each of those contexts actually requires is the question Part Two takes up.