How, if at all, has the concept of rhetoric mutated during post-modernity?
I gather than it ('rhetoric') began its life, in classical Greece, as a form of public discourse inclusive of 'poetry', 'history', etc.. But that it gradually became subordinate to 'logic' and a subset of 'poetry', losing its public function, and even anathema to 'truth' (with parallels in Plato). And with the Lyrical Ballads it became deceitful public discourse.
And what more recently?