 Still later on, important early modern commentators on promising in the Natural Law tradition such as Locke (1689, Two Treatises On Government, II-II:14), Reid (1788, Essay on the Active Powers of Man, 2), Grotius (1625, De iure naturae, ii. xi.), Pufendorf (1672, De iure naturae et gentium, iii. v. 9), Stair (1681/93, Institutions of the Laws of Scotland, I. X.1), and others developed the doctrine in new directions.