In international law, his other field of major scholarly interest, he published "La Crise de la codification et de la doctrine Argentine de droit international" (1931); and he spoke, wrote, or drafted legislation on many subjects with international ramifications - among them, asylum, colonization, immigration, arbitration, and international peace. His brief Vida internacional, which he wrote at the age of seventy, is an urbane by-product of all this study and experience.