Of the Law of Nature and Nations: Eight Books

"In 1662 Pufendorf was appointed to the first modern professorship in natural law (at the University of Heidelberg). In 1670 he became professor of natural law at the University of Lund in Sweden. First published in 1672, this is his principle work and a landmark in the history of natural and international law. Beginning with a consideration of fundamental legal ideas and their various divisions, Pufendorf proceeded to a discussion of the validity of customs, the doctrines of necessity and innate human reason. The work is significant in part because it developed principles introduced by Grotius and Hobbes. Unlike Hobbes, Pufendorf argued that peace, not war, was the state of nature, and he proposed that international law was not restricted to Christendom." -- Lawbook Exchange.