 Type causal relations are described by generic claims like “Drowsy driving causes crashes” or “Smoking causes cancer”. One prominent question concerns the relationship between type and token causal claims. One view has it that type causal claims are just generalizations or generics about token causal claims (see Lewis 1973; Hausman 1998: chapter 5; and Hausman 2005). For instance, to say that smoking causes cancer is just to say that token cancers are generally caused by token histories of smoking. And to say that drowsy driving causes crashes is just to say that, in general, token episodes of drowsy driving cause token crashes. Generic claims like these shouldn’t be understood as saying that most or even many token episodes of drowsy driving are token causes of car crashes. Compare: “mosquitos carry the West Nile virus”, which is a true generic despite the fact that most mosquitos do not carry the West Nile virus. (See the entry on  generics.)  On this view, type causal claims are ultimately about token causal relations.