" Like modern science, Buddhism talks about the existence of billions and billions of galaxies. The consciousness of a person born on earth may have come from a galaxy far away, drawn here by the force of karma, which connects that person’s mental energy to this planet. On the other hand, the consciousness of a person dying on this earth may at the time of death be karmically directed to
a rebirth in another galaxy, far from here. If more minds are being drawn to earth, the population increases; if fewer, it declines. That does not mean that brand new minds are coming into existence. Each mind taking rebirth here on earth has come from its previous life—perhaps in another galaxy, perhaps on earth itself, but not from nowhere. "

― , Becoming Your Own Therapist