Mafia ritual sameness across families itself requires explanation

Evidence

The challenge posed by this hypothesis, however, is to explain the degree of difference. Why do individual families in the mafia adopt the same ritual rather than carrying differentiation one step further? Or why does a certain ritual not transcend a given geographic area? — Diego Gambetta, The Sicilian Mafia The Business of…, 967

Categorization

• QUESTION: Worth chasing: if rituals are commitment devices against betrayal, what equilibrium sustains uniformity across rival families rather than divergent innovations?