"A "world religion" is a tradition that has achieved sufficient power and numbers to enter our history to form it, interact with it, or thwart it. We recognise both the unity within and the diversity among the world religions because they correspond to important geopolitical entities with which we must deal. All 'primitives,' by way of contrast, may be lumped together, as may the 'minor religions,' because they do not confront our history in any direct fashion. From the point of view of power, they are invisible."