This text examines the etymological and philosophical significance of the Czech term "prvočinitel" (prime factor or primordial agent). The author argues that this term does not merely denote fundamental, indivisible elements of reality—similar to the Greek "atomos" or Latin "individuum"—but specifically attributes activity and agency to them. The "prvočinitel" is thus conceptualized as a primordial subject or "proto-subject," representing a core philosophical problem. Within the framework of Aristotelian movement, the author asserts that all change must originate either from the intrinsic activity of a subject or from the inertia of a previous movement initiated by one. This primordial activity of countless proto-subjects is identified as the essential prerequisite for the process of "centrocomplication" and the evolutionary progression toward higher levels of complexity. Ultimately, these primordial agents are seen as the fundamental movers of the universe, whose activity forms the ontological basis for all transformations and the development of higher-level subjects.