Yeah, you are right, Wessely and Co got onto the bandwagon a bit later in the 1980s. Though in fact the mass hysteria view of ME/CFS given by McEvedy and Beard in 1970 was already refuted before the 70s were out. Wikipedia says: So since the McEvedy and Beard mass hysteria view of ME/CFS was refuted by the end of the 1970s, it is not clear how the erroneous psychiatric view of ME/CFS continued to be promulgated. No doubt the nefarious activities of the disability insurance industry played a major role in continuing to promote the psychiatric view of ME/CFS in the next decade. The 1980s saw the creation of the label "chronic fatigue syndrome" by the CDC — a label which defined ME/CFS as psychiatric, rather than the extant neurological definition of myalgic encephalomyelitis — and the 1980s saw the rise of the Wessely School pseudoscience, which cast the ME/CFS disease as a psychological condition, specifically, casting ME/CFS as a disease whose symptoms were caused by the fact that you held the belief in your mind that you were ill. All this continued to distract the medical community away from researching the enteroviral etiology that was known already back in the 1950s. Arguably, had it not been for the distracting pseudoscience promulgated by the psychiatrists, the pursuit of the enteroviral etiology of ME/CFS would have been far more advanced by now. These meddling psychiatrists have wasted decades on fruitless psychological research, and usurped much of the research funding from what was known, even as far back as the 1950s, to be viral disease precipitated by enteroviruses (coxsackievirus and echovirus).