Research into the use of psychedelics is yielding exciting results.

Clinical trials at N.Y.U.—a second one, using psilocybin to treat alcohol addiction, is now getting under way—are part of a renaissance of psychedelic research taking place at several universities in the United States, including Johns Hopkins, the Harbor-U.C.L.A. Medical Center, and the University of New Mexico, as well as at Imperial College, in London, and the University of Zurich.