2023. Human Nature & World Affairs. An Introduction to Classical Liberalism and International Relations Theory . London: The Institute of Economic Affairs.

Korean translation: https://iea.org.uk/wp-content/uploads/2025/09/Human-Nature-and-World-AffairsKorean.pdf

Review by Dr Samuel Gregg at Law & Liberty: https://lawliberty.org/book-review/a-foreign-policy-of-liberty/

Review by Brian A. Smith at Fusion: https://www.fusionaier.org/post/what-do-classical-liberals-have-to-say-about-international-politics

Review by Patrick van Schie in Liberale Reflecties (december 2023): Een klassiek-liberale kijk op de wereld. pp 61-64

What does Classical-Liberal Foreign Policy Look Like? Mises Institute review in podcast War, Economy, and State (24 January 2024)

2015. Degrees of Freedom. Liberal Political Philosophy and Ideology. Milton Park & New York: Routledge, 2015.

2011. Beloved but Unknown. The Political Philosophy of Liberalism. [In Dutch]. Soesterberg: Aspekt.

2009. Classical Liberalism and International Relations Theory. Hume, Smith, Mises, and Hayek. New York & Basingstoke: Palgrave Macmillan.