General introduction contextualizes research presented in the project and presents the three main conversation partners that are taken into account. First, it explains crucial stages of the development of evolutionary theory – from Darwin’s proposal, through the neo-Darwinian contribution and the two stages of the twentieth century evolutionary synthesis, until the most recent expanded evolutionary synthesis. Second, it lists foundational categories in the Aristotelian-Thomistic metaphysics that become relevant in the context of contemporary evolutionary biology. Finally, it refers to the classical theology of creation as grounding a constructive model of the most up-to-date Thomistic version of theistic evolution that will be developed in the book. Introduction ends with a general plan of the project.