“…The issue has since been explored in more detail in a symposium organized by Léna Soler, published in History and Philosophy of Science (Franklin, 2008;Sankey, 2008;Soler, 2008aSoler, , 2008bTrizio, 2008), in a focus section of Isis dedicated to the role of counterfactuals in the history of science (Bowler, 2008;French, 2008;Fuller, 2008;Henry, 2008;Radick, 2008) and at a conference titled Science as it Could Have Been, held in 2009. 2 We can find some further explicit references to the contingency issue (Kidd, 2013, in press;Martin, 2013;Radick, 2003Radick, , 2005 but in general, systematic and conceptually rigorous literature on the problem is rare. Hence, we are confronted with a remarkable discrepancy between the large amount of sociological, historical and philosophical literature that raises vital questions concerning contingency in science on the one hand, and the small amount of philosophical work that is explicitly devoted to this issue on the other.…”