The wrong reason and the right one
It is easy to say Plutarch matters because he preserves information about the ancient world. That is true and it is not the interesting reason — for many of his figures, the historians give us better facts and firmer chronology. The platform reads the real reason elsewhere: Plutarch is the classical author who, more than any other, treats the shape of a life as the right unit for thinking about virtue, power and conduct. What he offers is not data but a way of seeing.
What the moral biography does that nothing else does
The platform reads Plutarch's moral biography as occupying a space that two more prestigious modes of thought leave empty. Abstract ethical theory tells you what virtue is in general but loses the texture of the hard case, where conduct is actually decided. Structural history tells you how forces and institutions move but loses the person making the choice. Plutarch holds exactly the middle ground they vacate: the particular human being, in the particular situation, acting well or badly under pressure. He shows what courage, ambition, integrity and self-command look like in a life — and that showing is a kind of knowledge the other modes cannot supply.
The long proof of influence
Plutarch's continuing importance is written in his afterlife. The platform reads the chain of his readers as the demonstration: Montaigne built the personal essay out of him; Shakespeare took his Roman plays from him through North's translation; Rousseau, Emerson and the American and French founders read him as a manual of conduct in public life. For fifteen centuries those who wanted to understand greatness, or to school themselves for it, went to Plutarch. The platform reads this not as dead reception history but as evidence that the moral biography keeps doing its work — that readers keep finding in his figures a usable image of how to live and how to lead.
Reading him now, without credulity
The platform's case for Plutarch is not a case for reading him naively. He wrote centuries after most of his subjects; he prized character over chronology and would keep a revealing anecdote of doubtful truth; he is a witness to traditions and to his own moral vision more than to bare events. The discipline is to read him for what he is good for — the study of character under the test of power — while keeping the historian's caution about his facts. Read that way, the platform finds him not superseded but distinctive: the one ancient author who still teaches, as he meant to, by example. The companion arguments are in history as moral instruction and the uses of history.