Of old, the demagogue was also a general, and then democracies changed into tyrannies. Most of the ancient tyrants were originally demagogues. They are not so now, but they were then; and the reason is that they were generals and not orators, for oratory had not yet come into fashion.
Aristotle, (2014). “Complete Works of Aristotle, Volume 2: The Revised Oxford Translation”, p.2072, Princeton University Press