Plutarch's best-known work is the Parallel Lives, a series of biographies of famous Greeks and Romans, arranged in pairs to illuminate their common moral virtues and vices. The surviving Lives contain 23 pairs, each with one Greek Life and one Roman Life, as well as four unpaired single Lives.
As is explained in the opening paragraph of his Life of Alexander, Plutarch was not concerned with history so much as the influence of character, good or bad, on the lives and destinies of men. Whereas sometimes he barely touched on epoch-making events, he devoted much space to charming anecdote and incidental triviality, reasoning that this often said far more for his subjects than even their most famous accomplishments. He sought to provide rounded portraits, likening his craft to that of a painter; indeed, he went to tremendous lengths (often leading to tenuous comparisons) to draw parallels between physical appearance and moral character. In many ways, he must be counted amongst the earliest moral philosophers.
Some of the Lives, such as those of Heracles, Philip II of Macedon and Scipio Africanus, no longer exist; many of the remaining Lives are truncated, contain obvious lacunae or have been tampered with by later writers. Extant Lives include those on Solon, Themistocles, Aristides, Pericles, Alcibiades, Nicias, Demosthenes, Pelopidas, Philopoemen, Timoleon, Dion of Syracuse, Alexander the Great, Pyrrhus of Epirus, Romulus, Numa Pompilius, Coriolanus, Theseus, Aemilius Paullus, Tiberius Gracchus, Gaius Gracchus, Gaius Marius, Sulla, Sertorius, Lucullus, Pompey, Julius Caesar, Cicero, Cato the Younger, Mark Antony, and Marcus Junius Brutus.
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