“For commitment theorists, political and economic ideologies that obey transcendent behavioral laws do for people pretty much what religious belief in the supernatural is supposed to do. One frequently cited example of religious-like ideology is Lenin's doctrine of dialectical materialism. An equally plausible candidate is what financier George Soros calls "market fundamentalism." Like more familiar religious doctrines, these promissory ideologies seem to maintain the faith no matter how many contrary facts or reasons they face. But if such secular ideologies perform the same functions as religious ideologies, then why did at least 50 percent of Marx-fearing Russians feel the need to preserve their belief in the supernatural (survey by Subbotsky 2000)? And why is the overwhelming majority of market believers also God-fearing (Novak 1999; Podhoretz 1999). What is it about belief in the supernatural that thwarts social defection and deception, underpinning moral orders as no secular ideology seems able to do for long?”

Introduction: an evolutionary riddle, p. 14
In Gods We Trust: The Evolutionary Landscape of Religion (2002)