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He was an especially zealous campaigner against [[masturbation]]; this was an orthodox view during his lifetime, especially the earlier part. Kellogg was able to draw upon many medical sources' claims such as "neither the plague, nor war, nor small-pox, nor similar diseases, have produced results so disastrous to humanity as the pernicious habit of [[onanism]]," credited to one Dr. Adam Clarke. Kellogg strongly warned against the habit in his own words, claiming of [[masturbation]]-related deaths "such a victim literally dies by his own hand," among other condemnations. He felt that [[masturbation]] destroyed not only physical and mental health, but the moral health of individuals as well. Kellogg also believed the practice of this "solitary-vice" caused cancer of the womb, urinary diseases, nocturnal emissions, impotence, epilepsy, insanity, and mental and physical debility; "dimness of vision" was only briefly mentioned.