The Medieval RiskReward Society offers a study of adventure and love in the European Middle Ages focused on the poetry of authors such as Marie de France Chrtien de Troyes Wolfram von Eschenbach and Gottfried von Strassburgshowing how a society based on sacrifice becomes a society based on wagers and investments. Will Hastys sociological approach to medieval courtly literature informed by the analytic tools of game theory reveals the blossoming of a worldview in which outcomes are uncertain such that the very self of a character or an authorial persona is contingent on success or failure in possessing the things it desiresand upon which its social identity and personal happiness depend. Drawing on a diverse selection of contrasting canonical works ranging from the Iliad to the biblical book of Joshua to High Medieval German political texts to the writings of Leibniz and Mark Twain Hasty enables an appreciation of the distinctive contributions made in antiquity and the Middle Ages to the medieval emergence of a European society based on risks and rewards. ampampnbsp The Medieval RiskReward Society Courts Adventure and Love in the European Middle Ages takes a descriptive approach to the competitions in religion politics and poetry that are constitutive of medieval culture. Culture is considered always to be happening and to be happening on the cultural cutting edge as competitions for rewards involving the element of chance. This study finds adventure and lovethe principal concerns of medieval European romance poetryto be cultural game changers and thereby endeavors to make a humanist contribution to the development of a cultural game theory.