“Of all the major developments in the history of science, there may be no better example than that of the periodic system to argue against Thomas Kuhn’s thesis that scientific progress occurs through a series of sharp revolutionary stages.20 Indeed, Kuhn’s insistence on the centrality of revolutions in the development of science and his efforts to single out revolutionary contributors has probably unwittingly contributed to the retention of a Whiggish history of science, whereby only the heroes count while blind alleys and failed attempts are written out of the story.21”