Political parties are necessary but not sufficient for durable legitimacy.

Evidence

A state founded upon political parties may well be a necessary condition for modern political legitimacy of any real durability. But it is distressingly far from being a sufficient condition. — Diego Gambetta, Trust - Making and Breaking Cooperative…, 1256

Categorization

• ADDENDUM: Tangential to the ‘Grafting & Growth’ infrastructure essay only as a structural metaphor — better connected instead to the political-legitimacy framing the reader is building.
• XREF: connects to: Legitimacy requires a visible link between votes and policy, not just good results — Jürgen Habermas, A New Structural Transformation of the…, 98