Hugo Grotius (grō´shəs), 1583–1645, Dutch jurist and humanist, whose Dutch name appears as Huigh de Groot. He studied at the Univ. of Leiden and became a lawyer when 15 years old. In Dutch political affairs Grotius supported Oldenbarneveldt against Maurice of Nassau. After Maurice gained power he had Grotius condemned (1619) to prison for life, but Grotius made a daring escape in 1621 and fled to Paris. There, expanding certain views he had earlier recorded but had never published, he wrote De jure belli ac pacis [concerning the law of war and peace] (1625, definitive ed. 1631), usually considered the first definitive text on international law. In it Grotius contended that natural law prescribes rules of conduct for nations as well as for private individuals. He derived much of the specific content of international law from the Bible and from classical history. Although he did not condemn war as an instrument of national policy, he maintained that it was criminal to wage war except for certain causes. Much of his book is an attempt to make the conditions of warfare more humane by inducing respect for private persons and their property. Grotius returned briefly to Holland in 1631, but was forced to flee in 1632. From 1635 to 1645 he represented Sweden at the French court. Although generally regarded as the founder of international law, Grotius was indebted for much of his work to earlier scholars, especially Gentili. Grotius was also a leading student of theology and biblical criticism, and he wrote an authoritative account of contemporary Dutch political affairs.
See study by E. Durnbauld (1969).