Melvin Tumin
... that American sociologist Melvin Tumin challenged the Davis–Moore hypothesis and went on to write a widely used text book on social stratification?
... that American sociologist <b id="mwBc4"><a href="./Melvin_Tumin" id="mwBc8" rel="mw:WikiLink" title="Melvin Tumin">Melvin Tumin</a></b> challenged the <a href="./Davis–Moore_hypothesis" id="mwBdA" rel="mw:WikiLink" title="Davis–Moore hypothesis">Davis–Moore hypothesis</a> and went on to write a widely used text book on <a href="./Social_stratification" id="mwBdE" rel="mw:WikiLink" title="Social stratification">social stratification</a>?