Moreover, with reference to acts of
legislation, it is useful not only to understand what form of government is
expedient by judging in the light of the past, but also to become acquainted
with those in existence in other nations, and to learn what kinds of government
are suitable to what kinds of people. It is clear, therefore, that for
legislation books of travel are useful, since they help us to understand the
laws of other nations, and for political debates historical works.1
All these things, however,
belong to Politics and not to Rhetoric.
Such, then, are the most important questions upon which the would-be deliberative
must be well informed.
Now let us again state the sources whence we must derive our arguments for
exhortation or discussion on these and other questions.