A new perspective on the philosophical implications of quantum field theory

I discuss issues concerning the philosophical foundations and implications of quantum field theory, renormalization in particular. A new understanding of the correspondence principle, an unexpected role of perturbation theory and, most of all, a criterion to reduce the set of consistent theories from infinitely many to finitely many, are the key concepts of a theoretical set-up that appears to overcome in a natural way various consistency problems of quantum mechanics and offer several hints for further developments.