Roger Revelle, a Harvard professor, was "the original inspiration for Al Gore's involvement with the global warming issue." 
- In 1991, he coauthored an article with Fred Singer, saying, among other things, "Drastic, precipitous, and especially, unilateral steps to delay the putative greenhouse impacts can cost jobs and prosperity and increase the human costs of global poverty, without being effective." This was not what Al Gore and his friends wanted to hear. In the 1992 Presidential campaign, claims were floated that Revelle had become senile before his death (of a heart attack, later in 1991). Singer was publicly accused by Justin Lancaster, who was a science adviser to Gore, of taking advantage of Revelle's mental incapacity and putting his name on the article without his consent. Singer sued. Lancaster settled, with a public retraction . . .