Due to Born–Oppenheimer approximation and quantum electrodynamics, the reduction of chemistry to physics is quite successful. However, it's less obvious whether biology or economics also can be explained by physics. Thus the question is raised.

If a unified theory of physics derives biology, at some point in the derivation, it should say something like there is life in the universe, but it seems possible to construct hypothetical lifeless universes that physical laws all hold up.