This text explores the concept of cosmogenesis and the gradual constitution of the world as a whole. It argues that the world is not a pre-given set of entities but an ongoing process shaped by the 'reactibility' of individual events. The world's totality is only constituted as evolution progresses toward beings capable of relating to this whole intellectually and practically, thereby becoming its inhabitants. This development is not limited to human ontogeny; it includes the environments of lower organisms and extends back to the primordial, pre-living level. A conceptual reconstruction of this process requires frameworks that avoid reductive objectomorphism, treating even elementary events as seeds of the cosmos. By combining a phenomenological introduction with an evolutionary perspective, the author seeks to describe the path where the emergence of humanity and the constitution of the world are two sides of the same coin. The world is thus understood as an unfinished, evolving totality in which every event plays a constitutive role.