Chapter two analyses world views, conceptions of time and practices of war from the late Middle Ages and the Renaissance. This chapter provides a comparison and contrast with the time after 1650 and after 1800. Medieval world views emphasized certainty and predictability since everything was a part of Divine Providence and history proceeded along a given trajectory towards the return of Christ. However, there was considerable room for human agency that brought about change in the world. Without a free will, there would be neither sin nor grace. Contemporaries created rules and norms to make war more predictable and to hem in the workings of chance. During the Renaissance, thinking about predictability and the limits of human control advanced dramatically. Humanists used terms like Fortuna, Virtù and Decorum to conceptualize chance, human capability and the necessity of adapting to circumstances. The Protestant reformers argued that the world is essentially predetermined by God and humans have no freedom of choice. Paradoxically, this world view galvanized Protestants to political and strategic action in England, France, Germany and Scandinavia.