John Dewey was both a devoted student of politics and an eminent philosopher. He constructed his theory of political democracy according to his own philosophical orientation. At the same time, he believed that political science should be pursued independently of political philosophy on the assumption that the “scientific method” alone is meaningful in resolving political questions. It is through his philosophy of “experience,” instrumentalism, that Dewey resolved the potential antithesis between philosophy and experimental science as he understood it. It is the scientific method alone, Dewey insists, that can do justice to the integrity of “experience.” Moreover, through its application to political democracy, the scientific method is the link connecting philosophical instrumentalism and democracy. Accordingly, this essay will attempt to show: 1) the threefold relationship among philosophy, science, and democracy provides the key to an understanding of Dewey's political thought; 2) the philosophical antecedents of instrumentalism, being inseparable from Dewey's “scientific method,” provide normative content for his democratic theory; and 3) the purpose of Dewey's application of the scientific method to political democracy is to reshape traditional values in accordance with the philosophical — and not necessarily scientific — antecedents of instrumentalism.