Following the overthrow of the classical world picture by the findings of quantum mechanics, physicists have proposed a broad gamut of alternative worldviews. The Quantum Enigma begins with the major recognition that each of these suffers from a certain "residual Cartesianism" that has been smuggled in unconsciously. It turns out that the moment this hidden and problematic premise is discarded, quantum theory begins to "make sense" in a way that it never has before. As the author shows, it is now possible, for the first time, to integrate the findings of quantum physics into a worldview that conforms to the permanent intuitions of mankind. This work can be read by scientists but is also surprisingly accessible to the general reader unacquainted with the technical conceptions of physics or the quantum-reality literature.