 Aristotle makes it clear that the number of people with whom one can sustain the kind of relationship he calls a perfect friendship is quite small (IX.10). Even if one lived in a city populated entirely by perfectly virtuous citizens, the number with whom one could carry on a friendship of the perfect type would be at most a handful. For he thinks that this kind of friendship can exist only when one spends a great deal of time with the other person, participating in joint activities and engaging in mutually beneficial behavior; and one cannot cooperate on these close terms with every member of the political community. One may well ask why this kind of close friendship is necessary for happiness. If one lived in a community filled with good people, and cooperated on an occasional basis with each of them, in a spirit of good will and admiration, would that not provide sufficient scope for virtuous activity and a well-lived life? Admittedly, close friends are often in a better position to benefit each other than are fellow citizens, who generally have little knowledge of one’s individual circumstances. But this only shows that it is advantageous to be on the receiving end of a friend’s help. The more important question for Aristotle is why one needs to be on the giving end of this relationship. And obviously the answer cannot be that one needs to give in order to receive; that would turn active love for one’s friend into a mere means to the benefits received.