The following list contains some of the works studied and sometimes cited by Jackson Pemberton, who supposes that his insights on natural rights and their secular basis are his own, but realizes that one can never be certain about such things.
Not mentioned are a number of important items like the Constitution of the United States with its amendments, numerous websites including Wikipedia, and conversations with friends and political foes.
Austin, Jean, et al. The Empiricists: Locke, Berkeley, and Hume. Anchor Books, 1974.
Barnett, Randy E. “The Declaration of Independence and the American Theory of Government: First Come Rights, and Then Comes Government.” Harvard Journal of Law & Public Policy, vol. 42, no. 1, Winter 2019, pp. 23–28.
Barton, David. Original Intent: the Courts, the Constitution, and Religion. WallBuilder Press, 2010.
Barton, David. Separation of Church & State, What the Founders Meant. WallBuilder Press, 2007.
Bastiat, Frédéric. The Law. Foundation for Economic Education, 1950.
Church, Forrest. So Help Me God: the Founding Fathers and the First Great Battle Over Church and State. A Harvest Book, Harcourt, 2007.
Dershowitz, Alan M. Rights from Wrongs. Basic Books, 2005.
Friedman, Milton Capitalism and Freedom, University of Chicago Press, 2002.
Hamburger, Philip. Separation of Church and State. Harvard University Press, 2004.
Hamilton, Alexander, et al. The Federalist Papers. New American Library, 1961.
Howard, John A. Christianity: Lifeblood of America’s Free Society (1620-1945). Summit Press, 2008.
Newman, Grant M. “The Taxation of Religious Organizations in America.” Harvard Journal of Law & Public Policy, vol. 42, no. 2, Spring 2019, pp. 681–710.
Oaks, Dallin H. The Wall between Church and State. The University of Chicago Press, 1963.
Ross, Tara, and Joseph C. Smith. Under God: George Washington and the Question of Church and State. Spence Publishing Company, 2008.
Tuck, Richard. Natural Rights Theories, Their origin and development. Cambridge University Press, 1979.