["American Journal of Economics and Sociology, Volume 79, Issue 4, Page 1147-1180, September 2020. ", "\nAbstract\nIn his encyclical Laborem Exercens, John Paul II asserts the principle of the priority of labor over capital. The purpose of this article is to examine this principle. The conflict between labor and capital is often noted as an essential part of capitalism. There is a long tradition of assigning more significance to labor than to capital. In fact, the classical economists argued that labor determined the “value” of a good. To understand this conflict, we must first review what is capital and its role in capitalism. We will then look at John Paul II’s assertion of the principle of labor over capital, followed by a review of how economists have understood the relationship between labor and capital. Neoclassical economists dismiss labor and capital as classes, so they believe there is no conflict. We examine one neoclassical economist’s claim of a gap in the principle of the priority of labor over capital by not including finance capital in the analysis. We demonstrate that the Church’s teachings on usury answer the objections raised. We conclude with a review of the implications of the priority of labor over capital.\n"]