Aristotle on τύχη and εὐτυχία

It is commonly supposed that one can build Aristotle’s account of luck (τύχη) and good fortune (εὐτυχία) from Ph. II 4–6 and Eth. Eud. VIII 2. Indeed, in these texts, he is concerned with providing a general account of each. There has, however, been some dispute on the relationship between the texts. Some argue that the two accounts conflict, and the notion of τύχη or εὐτυχία we find in the Ph. is not the one that Aristotle has in mind in Eth. Eud. Others argue that there are two notions of “luck” in Eth. Eud. : one that fits with the account in the Ph. and another that is more stable. Almost no one argues that εὐτυχία in Eth. Eud. VIII 2 is a subspecies of τύχη. I will argue that Aristotle does indeed have two notions of εὐτυχία, a narrow and a broad one. But I show that the distinction is set aside in Eth. Eud. VIII 2 where Aristotle only discusses εὐτυχία as a subspecies of τύχη. We see this especially if we compare the account in Eth. Eud. with what Aristotle says about εὐτυχία in his other ethical treatises. The upshot is that there is a narrower focus in Eth. Eud. than in the other treatises when it comes to εὐτυχία.