Whitehead's term for the enduring patterns — tables, brains, institutions, persons — that classical metaphysics treats as substances: a pattern of actual occasions maintaining a defining character across time.
A society, in Whitehead's technical sense, is a nexus of actual occasions that exhibit a shared defining characteristic inherited from occasion to occasion. The table persists not because some substance-table endures unchanged but because successive occasions of the table (at the atomic level) maintain a stable configuration. The person persists not because a soul-substance persists but because the occasions of her experience inherit a defining pattern from their predecessors, generating the continuity we call personhood.
Society of Occasions
In The You On AI Field Guide
The concept has direct application to institutions and teams undergoing AI-augmented transformation. A workplace is a society in Whitehead's sense. It persists because its constituent occasions — working days, tasks, interactions — exhibit a shared pattern inherited across time. When a new kind of occasion is introduced — AI-assisted work with its different tempo, different reach, different relationship between effort and output — the defining character of the society shifts. The society is re-constituted around the new occasions.