Abstract In James Crawford’s later career as a public international lawyer, he was synonymous with the great topics of inter-state relations—the creation of states, state responsibility, and so forth—and with the work of the International Court of Justice. But he retained throughout his professional life an abiding interest in foreign relations law, being that loose collection of issues that characterises the interface between public international and municipal law. Nowhere is this better reflected than in his contribution to the law of state immunity—and, in particular, his preparation as Commissioner of the ground-breaking 1984 Australian Law Reform Commission Report No 24 on Foreign State Immunity (‘ALRC 24’), which led in due course to the Foreign States Immunities Act 1985 (Cth) (‘FSIA’) being passed by the Federal Parliament almost unchanged from Commission’s suggested text. This paper aims to assess the legacy of ALRC 24 alongside other writings on state immunity that Crawford published prior to and in conjunction with the report—in particular his significant articles in the Australian Year Book of International Law, the American Journal of International Law and the British Yearbook of International Law. This corpus of materials shows Crawford in two underexplored guises—as municipal lawyer and legislative draftsman. And they also show his instincts as one of the great liberalisers of public international law, committed to ensuring that the parameters of the restrictive theory of state immunity, then novel to the common law, were accurately reflected in legislative language.