 Aristotle then adds, “The common advantage also brings them together insofar as they each attain the noble life. This is above all the end for all both in common and separately” (III.6.1278b19–24). Second, what are the different forms of rule by which one individual or group can rule over another? Aristotle distinguishes several types of rule, based on the nature of the soul of the ruler and of the subject. He first considers despotic rule, which is exemplified in the master-slave relationship. Aristotle thinks that this form of rule is justified in the case of natural slaves who (he asserts without evidence) lack a deliberative faculty and thus need a natural master to direct them (I.13.1260a12; slavery is defended at length in Politics I.4–8). Although a natural slave allegedly benefits from having a master, despotic rule is still primarily for the sake of the master and only incidentally for the slave (III.6.1278b32–7). (Aristotle provides no argument for this: if some persons are congenitally incapable of governing themselves, why should they not be ruled primarily for their own sakes?) He next considers paternal and marital rule, which he also views as defensible: “the male is by nature more capable of leadership than the female, unless he is constituted in some way contrary to nature, and the elder and perfect [is by nature more capable of leadership] than the younger and imperfect” (I.12.1259a39–b4).