Diamond, Martin. “The Dependence of Fact upon ‘Value.’” Interpretation 2, no. 3 (Spring 1972): 226–35. Included in: Diamond, Martin. As Far as Republican Principles Will Admit: Essays by Martin Diamond. Edited by William A. Schambra. Washington, DC: AEI Press, 1992.

At the heart of modern behavioral political science is the rigid distinction between “fact” and “value”—a distinction, Diamond argues in this article published in Interpretation in 1972, that makes utterly impossible the genuine study of politics. Such a study requires a grasp of the extent to which fact depends upon value, and that is what his essay seeks to provide.

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Interpretation
As Far as Republican Principles Will Admit (Read Free Online at Internet Archive)