This text addresses the fundamental problem of determinism, specifically the question of how one entity can causally determine or influence another. The author distinguishes between mere inertia, which must be explained as a mediated type of activity, and the direct action of the past upon the future, which he characterizes as logically untenable and absurd. The core of the argument lies in a re-evaluation of the concept of temporality. 'Temporalization' is presented as an active performance striving toward the future, rather than a passive submission to the flow of time. The author asserts that anything truly 'new' cannot have its source or origin in the past, but is instead realized through the actualization of future possibilities. The central conclusion is that determination is not a one-sided pressure from past events, but is essentially dependent on the capacity to respond, or 'reactibility.' The text thus rejects linear causality in favor of a dynamic model emphasizing local conditions and the active process of temporalization.