Abstract
Belonging to the textual genetics, discipline that studies the creation process of major literary or scientific works, the following paper discusses the Crocian myth of the uniqueness of the work that implies the uniqueness of the genesis. The work isn’t unique but just original and its genesis too. This hypothesis also allows also the articulation of common morphologies of the process of the invention. The paper proposes a plurality of types of genesis, such as the linear, canonic or partial, that aren’t able to satisfy the needs of the individual project, and twin genesis or hypergenesis, of which genetic substance supersedes the needs of an individual project, nourishing other works that constitute themselves into typological families. Such a classification represents an efficient epistemological instrument to studying the genesis of various texts. This kind of view is an entirely new way of looking at the invention and creation processes.