In ufology, the psychosocial hypothesis, abbreviated PSH, argues that at least some UFO reports are best explained by psychological or social means. It is often contrasted with the better-known extraterrestrial hypothesis (ETH), and is particularly popular among UFO researchers in the United Kingdom, such as David Clarke, Hilary Evans, the editors of Magonia magazine, and many of the contributors to Fortean Times magazine. It has also been popular in France since the publication in 1977 of a book written by Michel Monnerie, Et si les ovnis n'existaient pas? (What if UFOs do not exist?). UFOlogists claim that the psychosocial hypothesis is occasionally confused with aggressive anti-ETH debunking, but that there is an important difference in that the PSH researcher sees UFOs as an interesting subject that is worthy of serious study, even if it is approached in a skeptical (i.e. non-credulous) way. The psychosocial hypothesis builds on the finding that most ufo reports have mundane explanations like celestial objects, airplane lights, balloons, and a host of other misperceived things seen in the sky which suggests the presence of an unusual emotional climate which distorts perceptions and the perceived significance and anomalousness of merely terrestrial stimuli. In the more exotic situation where people claim direct contact with extraterrestrials, the need for a psychosocial approach seems obligated by the presence of at least 70 claims of people meeting Venusians and at least 50 claims of meeting Martians; both worlds now known to be uninhabitable and devoid of any advanced civilization. Hoaxing seems to explain some of these contactees claims, but visionary dreams, hallucinations, and other mental processes are clearly implicated in such myth-based material. By generalization, the other material suggesting the presence of extraterrestrial entities from elsewhere is hypothesized to be explainable by similar means. The observed presence of surreal dream-like activity and imagery or themes based in the cultural environment and historically understood sources reinforces the proposition that the extraterrestrial hypothesis is unnecessary and, by Occam's razor, probably incorrect. Origin In the English UFO literature, the term psycho-social hypothesis first achieved prominence in April 1984 when the cover of Magonia featured "The Rise of the Psycho-social hypothesis" by Jacques Scornaux and Peter Rogerson. Scornaux's use of the term traces back to French UFO controversies spawned by Michel Monnerie whose book Le Naufrage des Extra-terrestres (1979) presented "le modèle socio-psychologique" as a direct challenge to the extraterrestrial hypothesis. Claude Maugé had exposed