See Eric Nelson, The Hebrew Republic: Jewish Sources and the Transformation of European Political Thought (Cambridge, Mass: Harvard University Press, 2010).
 Ninety-Two Poems and Hymns of Judah Halevi, trans. Thomas Kovach, Eva Jospe, and Gilya Gerda Schmidt (Albany, NY: State University of New York Press, 2000), 124.
 Maimonides, The Guide for the Perplexed, III:32.
 Aristotle, Politics I:5.