Gnosticism starts with a fundamentally flawed view of reality. Ancient gnosticism rejected the immanent (earthly) realm of reality. Modern gnosticism rejects the transcendent realm and, with it, the Tao. Eric Voegelin did the most among all philosophers to raise the alarm about gnosticism and its perennial quality. There has almost always been a gnostic element of society, and it has always been a problem, and it's a huge problem today because modern culture is culturally gnostic.