Tumin challenged the Davis–Moore hypothesis of social stratification with his paper "Some principles of stratification: a critical analysis".[5][6] Tumin took Davis–Moore to imply that social stratification was mostly inevitable and provided a positive function for society. He analyzed the arguments of Davis and Moore and found them wanting in a number of respects.[6] In a reply to Tumin's paper, Davis stated that his ideas seek to explain inequality, rather than justify it. Davis also accused Tumin of a number of errors.[7] Tumin's 1967 book Social Stratification: The Forms and Functions of Inequality was widely used as a textbook and was re-issued in 1985.[1]