One of the earliest criticisms of the field was issued by the humanistic psychologist Rollo May, who disputed the conceptual foundations of transpersonal psychology. According to commentators May also criticized the field for neglecting the personal dimension of the psyche by elevating the pursuit of the transcendental, and for neglecting the "dark side of human nature". Commentators note that these reservations, expressed by May, might reflect what later theorists have referred to as "spiritual bypassing". Other commentators have suggested that May only focused on "New Age popularizations of transpersonal approaches". However, criticism has also come from other profiles in the field of humanistic psychology. Eugene Taylor and Kirk Schneider have raised objections to several aspects of transpersonal psychology.