Subject searches to try in SOLO
Religion and law
Religion and international relations
See Chapter 12 of Oxford Handbook of the History of International Law for useful overview
St Augustine
V Hrabar ‘La doctrine de droit international chez Saint Augustin’ (1932) 3–4 Archives de philosophie du droit et de sociologie juridique 428–46 Journal in Law Bod at Jurisp 300 A60
St Thomas Aquinas
ST 2–2, qu. 40
Summa Theologica Secunda Secundae Quaestio 40
Treatise on The Theological Virtues (Second Part of Second Part of ST) Question 40