The three constitutive elements are precise and each is tested differently by AI. The shared domain is the practice the members care about — not insurance in the abstract but claims processing as a lived daily engagement with specific problems. The community is sustained mutual interaction — the breakfast conversations, the questions asked at adjacent desks, the informal help extended across years. The practice is the accumulated shared repertoire — the stories, shortcuts, implicit standards, and collective memory that constitute knowledge-in-use.
Each element is structurally different from organizational assignment. People who share a floor but never interact are not a community of practice. People who share a domain without developing joint practice are a profession, not a community. The concept identifies a specific social formation that emerges through time and sustained engagement, and that cannot be manufactured by org chart.
The framework's diagnostic power in the AI moment comes from its precision about what gets lost when teams dissolve into solo builders. The imagination-to-artifact ratio may have collapsed, but the communities through which professional judgment was historically formed require time, proximity, and sustained joint work that solo building structurally eliminates. The builder retains whatever repertoire she absorbed from prior community membership; she cannot generate new repertoire alone.
Wenger's later work extended the concept into constellations of practice — networks of interrelated communities whose boundaries become sites of productive friction and cross-domain learning. The extension matters because organizations of any complexity are never single communities but overlapping constellations, and it is the connective tissue between communities that AI mediation most quickly erodes.
The concept emerged from the 1989 ethnographic work at the Institute for Research on Learning in Palo Alto, where Wenger watched claims processors learn through informal interaction rather than through the training programs their employer had designed. The collaboration with anthropologist Jean Lave produced Situated Learning in 1991; Wenger's solo masterwork Communities of Practice: Learning, Meaning, and Identity followed in 1998.
Wenger had come to the question from an unusual direction — his 1987 book had surveyed artificial intelligence tutoring systems, treating knowledge as a commodity to be extracted, encoded, and delivered. His encounter with Lave's apprenticeship research convinced him the entire paradigm was wrong at its foundations. The trajectory matters: the AI of the 1980s that Wenger rejected has returned in a form he could not have anticipated, raising the question his framework exists to answer.
Three constitutive elements. Shared domain, mutual engagement, and collective repertoire — each necessary, none sufficient alone.
Knowledge between people. The most consequential knowledge in any complex domain lives not in individual heads but in the community's shared practice.
Emerges, not designed. Communities of practice arise organically from the conditions of work; they can be cultivated but not specified top-down.
Reproduces through participation. New practitioners become practitioners by moving from periphery toward center within a community, not by receiving transmitted knowledge.
Generates more than members know. The community's knowledge exceeds the sum of individual knowledge because it lives in the interactions themselves — the stories, the corrections, the implicit standards negotiated through use.