A natural harmony among individuals serving their own self-interests and the broader interests of society was the main theme of the theories of __________, although this concept was not accepted through _________. Determine the correct answer from given options: (w) Karl Marx / David Ricardo. (x) Thomas Malthus / A.A. Cournot. (y) Adam Smith / Jeremy Bentham. (z) Carl Menger / Eugen Bohm-Bawerk.
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