 As a branch of logic, obligations came to flourish with European medieval logic from the thirteenth century onwards, and they slowly vanished when logic as a discipline, a.k.a. ‘scholastic logic’ retreated in the early modern times. During the peak period in the fourteenth century, many or perhaps even most European logicians wrote a dedicated text on obligations (de obligationibus). These texts were either stand-alone treatises or sections in overall presentations of logic. Of the former kind, treatises by Walter Burley (“Treatise on Obligations”, written c. 1302; Latin text in Green [1963], English translation in Kretzmann and Stump [1988]), Roger Swyneshed (written 1330–35; Spade [1977]) and Robert  Eland[1]  (written 1335–1370; Spade [1980]) have been particularly important in shaping the modern understanding of the topic. Of the latter kind, for example William Ockham’s Summa logicae (written c. 1323; Boehner, Gál, &amp; Brown [1974]) and Paul of Venice’s Logica magna (written 1397–98; Ashworth [1988]) can be mentioned as outstanding examples.