"This great poem stands with Virgil's Aeneid as one of the vital and enduring achievements of Latin literature.... Based on the tenets of Epicurean philosophy, On the Nature of Things asserts that matter is composed of an infinite number of small particles; that even the soul, like the body, is made up of these atoms and dissolves painlessly after death; that there is no afterlife and therefore no cause for fear; and that the universe operates without...