When shall we
say that a city is the same, and when shall we say that it is different?
It is but a superficial mode of examining into this question to begin
with the place and the people; for it may happen that these may be
divided from that, or that some one of them may live in one place, and
some in another (but this question may be regarded as no very knotty
one; for, as a city may acquire that appellation on many accounts,
it may be solved many ways); and in like manner, when men inhabit one
common place, when shall we say that they inhabit the same city, or that
the city is the same? for it does not depend upon the walls; for I can
suppose Peloponnesus itself surrounded with a wall, as Babylon was, and
every other place, which rather encircles many nations than one city,
and that they say was taken three days when some of the inhabitants
knew nothing of it: but we shall find a proper time to determine this
question; for the extent of a city, how large it should be, and whether
it should consist of more than one people, these are particulars that
the politician should by no means be unacquainted with. This, too, is a
matter of inquiry, whether we shall say that a city is the same while
it is inhabited by the same race of men, though some of them are
perpetually dying, others coming into the world, as we say that a river
or a fountain is the same, though the waters are continually changing;
or when a revolution takes place shall we [1276b] say the men are the
same, but the city is different: for if a city is a community, it is a
community of citizens; but if the mode of government should alter, and
become of another sort, it would seem a necessary consequence that the
city is not the same; as we regard the tragic chorus as different from
the comic, though it may probably consist of the same performers: thus
every other community or composition is said to be different if the
species of composition is different; as in music the same hands produce
different harmony, as the Doric and Phrygian. If this is true, it is
evident, that when we speak of a city as being the same we refer to the
government there established; and this, whether it is called by the
same name or any other, or inhabited by the same men or different.
But whether or no it is right to dissolve the community when the
constitution is altered is another question.
CHAPTER IV
What has been said, it follows that we should consider whether the
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