Concept "Everything Is Already Here": An Ontological Model of Parallel Universes

The article systematically presents and develops the concept "Everything Is Already Here" — an ontological model of parallel universes. Its essence: all elements of reality of all possible universes exist in a single ontological volume Ω. Different universes are different sets of active elements determined by the ontological selector S. S is not the choice of an observer and not a scale of observation, but a formal parameter that determines which elements from the complete set Ω are activated (manifested) in a given universe. S acts as natural selection under equilibrium: the universe activates only those elements that correspond to its stable parameters of space-time. The transition between universes is not movement in space but a change of S. It is shown that the concept explains quantum entanglement, nonlocality, and the absence of superluminal information transfer without postulating branching, interaction, or remoteness. Entangled particles are not connected by a superluminal signal; they are projections of one and the same element of Ω at a given S. This is consistent with the no-signaling theorem: the projection of a common element does not transmit information but only manifests a correlation. A comparison is conducted with existing approaches: Everett's many-worlds interpretation, Many Interacting Worlds of Hall, Wiseman, and Deckert, Lewis's modal realism, Saan's principle of plenitude, Tegmark's Multiverse, Susskind's string landscape. It is shown that the uniqueness of the model lies in the combination of the ideas of projection ontology, ontological choice S, and empirical testability. A program of empirical verification is proposed: CMB anomalies, H0 tension, variations of fundamental constants, anomalies in the distribution of galaxies, vacuum fluctuations (Casimir effect). Open questions are discussed: how does the change of S occur? Does a hierarchy of universes exist? How do elements of reality relate to physical fields and particles? Can traces of other values of S be detected in the laboratory? The model is open to further formalization and experimental verification.