2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/93292This is a philosophical paper in favor of the Many-Worlds Interpretation (MWI) of quantum theory. The concept of the ``measure of existence of a world'' is introduced and some difficulties with the issue of probability in the framework of the MWI are resolved. Brief comparative analyses of the Bohm theory and the Many-Minds Interpretation are given.21 pages, 5 eps figures, LaTeXQuantum Physicstext