The Swerve: How the World Became Modern

by Stephen Greenblatt

Of all the ancient masterpieces, this poem is one that should certainly have disappeared, finally and forever, in the company of the lost works that had inspired it. That it did not disappear, that it surfaced after many centuries and began once again to propagate its deeply subversive theses, is something one could be tempted to call a miracle. But the author of the poem in question did not believe in miracles. He thought that nothing could violate the laws of nature. He posited instead what he called a “swerve,”—Lucretius’ principal Latin word for it was clinamen—an unexpected, unpredictable movement of matter. The reappearance of his poem was such a swerve, an unforeseen deviation from the direct trajectory—in this case, toward oblivion—on which that poem and its philosophy seemed to be traveling. When it returned to full circulation after a millennium, much of what the work said about a universe formed out of the clash of atoms in an infinite void seemed absurd. But those very things that first were deemed both impious and nonsensical turned out to be the basis for the contemporary rational understanding of the entire world. What is at stake is not only the startling recognition of key elements of modernity in antiquity, though it is certainly worth reminding ourselves that Greek and Roman classics, largely displaced from our curriculum, have in fact definitively shaped modern consciousness. More surprising, perhaps, is the sense, driven home by every page of On the Na...