Fig. 4: Five models of the evolution of religious and political authority.
From: Coevolution of religious and political authority in Austronesian societies
a, In the full model, any transition between any two states is allowed. b, In the weak differentiation model, independent systems of authority must evolve from either combined or partly independent systems, and partly independent systems must evolve from combined systems. c, In the strong differentiation model, independent systems of authority must evolve from partly independent systems of authority, which in turn must evolve from combined systems of authority. d, In the weak unification model, combined systems of authority must evolve from either independent or partly independent systems of authority, and partly independent systems of authority must evolve from independent systems of authority. e, In the strong unification model, combined systems of authority must evolve from partly independent systems of authority, which in turn must evolve from independent systems of authority.
