Bernard Ackerman, the best known dermatologist in the world at the time, argued that: 1) the melanoma epidemic was being driven largely by overdiagnosis 2) the evidence that sunscreen prevents melanoma was weak This was a man known as a founding figure in the field of dermatopathology, and yet he described much of the field’s thinking on melanoma as “replete with nonsense” As @rowanjacobsen put it, “it’s one thing when an outsider says your science sucks; it's another when it comes from the guy who literally wrote your textbooks. The industry's response was to pretend it wasn't happening. His tributes tended to skirt the issue entirely, focusing on his powerful intellect, teaching prowess, and lifelong generosity” If Bernard Ackerman were still alive and I laid out the circadian perspective for him, I bet he would be even more militant in his opposition towards large parts of his own field