There would be no one to practice the arts. Philosophy cannot exist where there is no art. The human community would collapse if most of these men were not compelled to practice the arts necessary for the human community. Someone or some few would have to be compelled to govern the city. Fortunately, the great majority of men do not have the potential to become philosophers.
Philosophy is the preserve of the few.
The masses, or to use an older term, the many, do not have the virtues necessary to be philosophers. But philosophy needs the many. A man can live well only if he is a part of a human community. At the same time that the philosopher is a part of a human community, he is also outside it. It is this tension which makes it necessary for the philosopher to consider the requirements of the community as well as those of philosophy.