The Hedgehog and the Fox – Wikipedia
The title is a reference to a fragment attributed to the Ancient Greek poet Archilochus: πόλλ’ οἶδ’ ἀλώπηξ, ἀλλ’ ἐχῖνος ἓν μέγα (“a fox knows many things, but a hedgehog knows one big thing”). In Erasmus’s Adagia from 1500, the expression is recorded as Multa novit vulpes, verum echinus unum magnum. (The fable of The Fox and the Cat embodies the same idea.)
Berlin expands upon this idea to divide writers and thinkers into two categories: hedgehogs, who view the world through the lens of a single defining idea (examples given include Plato, Lucretius, Dante Alighieri, Blaise Pascal, Georg Wilhelm Friedrich Hegel, Fyodor Dostoyevsky, Friedrich Nietzsche, Henrik Ibsen, Marcel Proust and Fernand Braudel), and foxes, who draw on a wide variety of experiences and for whom the world cannot be boiled down to a single idea (examples given include Herodotus, Aristotle, Desiderius Erasmus, William Shakespeare, Michel de Montaigne, Molière, Johann Wolfgang Goethe, Aleksandr Pushkin, Honoré de Balzac, James Joyce and Philip Warren Anderson).
Source: The Hedgehog and the Fox – Wikipedia