An organization gradually becomes more culturally homogeneous over successive years, not through any single explicit decision to narrow the range of people it hires or retains, but through a well-documented, self-reinforcing cycle called the attraction-selection-attrition model, describing three connected mechanisms that combine to produce this narrowing effect, largely independent of any deliberate intent.
What the attraction mechanism specifically describes
Job candidates evaluating an organization's perceived culture, values, and existing employee composition tend to self-select toward organizations that already seem to resemble their own personality, values, and working style, meaning the pool of people who even apply to a given organization in the first place is already somewhat filtered toward those who perceive a good cultural match — a filtering that happens before any hiring decision is actually made, purely through candidates' own self-selection.
What the selection mechanism adds on top of this initial self-filtering
Hiring decisions, even without any explicit intent to select for cultural similarity, tend to favor candidates who seem like a comfortable fit with the organization's existing culture and composition, since interviewers naturally gravitate toward candidates who feel familiar and easy to work with — a pattern closely related to the similar-to-me bias discussed elsewhere, compounding the initial self-selection effect from the attraction stage with an additional layer of selection-stage filtering.
What the attrition mechanism adds as the final stage of the cycle
Employees who don't fit the existing organizational culture well, having made it through both the attraction and selection filters despite this imperfect fit, tend to experience lower job satisfaction and are more likely to leave voluntarily over time than employees who fit the culture more comfortably — meaning even the relatively few less-similar employees who do get hired are disproportionately likely to depart eventually, further narrowing the range of people who remain with the organization long-term.
Why these three mechanisms combine into a genuinely self-reinforcing cycle
Each successive stage of this cycle operates on an already-filtered population from the previous stage — attraction filters the applicant pool, selection further filters who's actually hired from that already-filtered pool, and attrition further filters who remains from among those hired — meaning the compounding effect across all three stages produces considerably more cultural homogeneity over time than any single stage operating in isolation would produce on its own.
Why this matters directly for organizational diversity and adaptability
An organization allowing this cycle to operate unchecked over an extended period risks developing a genuinely narrow range of perspectives, working styles, and backgrounds among its workforce, a pattern with real implications both for diversity specifically and for organizational adaptability more broadly, since a highly homogeneous workforce may be less well-equipped to recognize and respond to changing market conditions or challenge existing organizational assumptions than a more genuinely varied one.
What this means for organizations trying to maintain genuine diversity and varied perspectives over time
- Recognize that cultural homogeneity develops through a self-reinforcing cycle across attraction, selection, and attrition, not through any single hiring decision
- Actively counter selection-stage bias toward cultural similarity through structured interviews and diverse interview panels
- Monitor attrition patterns specifically for whether employees with different backgrounds or working styles are leaving at disproportionately higher rates
- Consider how the organization's own external messaging and perceived culture may already be filtering the applicant pool before any hiring decision occurs
The attraction-selection-attrition model describes a genuinely structural, self-reinforcing pattern, not simply a series of independent hiring choices — which is exactly why counteracting unwanted cultural homogeneity requires deliberate intervention at each of the three stages, not just attention to hiring decisions alone.