Where does our universe come from? Can the universe create itself? Why is there something instead of nothing? Does a universe born out of nothing exclude God? The birth of the universe has become, in recent decades, one of the central themes of scientific research. Physicists and philosophers have hypothesized the birth of the universe starting from the so-called "quantum vacuum". But it is not enough. In this volume we demonstrate how a universe can spontaneously create itself from nothing.