In his treatise Rhetoric, written in the fourth century BCE, Aristotle laid out three distinct means by which a speaker persuades an audience: ethos, an appeal grounded in the speaker's own credibility and character; pathos, an appeal that works by stirring the audience's emotions; and logos, an appeal built on logical argument and evidence. Modern political speechwriting still relies on essentially the same three levers, whether or not a given speechwriter has ever read Aristotle directly or would describe their own work in these terms at all.
Three different levers, and most real speeches pull more than one
Ethos does its persuasive work before an argument's actual content is even evaluated, by establishing that the speaker is the kind of person whose claims deserve to be taken seriously in the first place — a politician opening with their own relevant experience, or a doctor speaking with the authority their credentials confer, is leaning primarily on ethos. Pathos persuades by engaging the audience's feelings directly, often through vivid, specific, emotionally resonant stories rather than abstract statistics, since a single concrete example an audience can picture and feel something about frequently moves people more than a dry general statement does, even when the statistic represents a far larger underlying reality. Logos persuades through the argument's own internal logical structure — premises, evidence and a conclusion that's meant to follow from them — appealing to the audience's own reasoning rather than to the speaker's character or their emotions. Effective real-world speeches, including most well-remembered political ones, typically weave together elements of all three rather than relying on just one exclusively, since each lever compensates for something the others can't reliably supply on their own.
Aristotle's framework outlived the specific political context it was written for
Aristotle developed this framework specifically to analyse persuasive speech within Athenian civic and legal life, where citizens regularly spoke directly to large public audiences in the assembly and the courts, a context quite different from the mass broadcast and digital media through which political speech mostly travels today. Despite that considerable gap in context, the underlying three-part structure has proven remarkably durable and portable, still forming the backbone of how rhetoric and persuasive writing are taught, analysed and consciously deployed today, more than two millennia after it was first written down — not because political communication hasn't changed since Aristotle's time, but because the basic building blocks of what actually moves a human audience to believe or act on something appear to have changed rather less than the technology used to deliver them.
What we're still unsure about
Aristotle's original three-part framework, and its continued use as the standard vocabulary for teaching persuasive writing and rhetorical analysis today, are well documented and not genuinely in dispute among scholars of rhetoric. What's more actively debated is how much explanatory work the framework can really do when applied to a specific modern speech in practice — real persuasive appeals often blend ethos, pathos and logos so thoroughly that cleanly separating a given passage into one category rather than another can be more a matter of the analyst's own interpretive judgement than an objective, uncontestable fact about the text, a genuine limitation of using a two-thousand-year-old three-part scheme to categorise something as messy as an actual live speech.
This sits inside Persuasive Writing & Speechwriting, one of seven topics in Rhetoric, one of five domains in Literature, one of seventeen subjects the app can quiz you on.