Whether or not it was actually written by Aeschylus, as is much disputed, "Prometheus Bound" is a powerful statement on behalf of free humanity in the face of what often seem like the impersonal, implacable Forces that rule the Universe. As one of the most compelling rebel manifestos ever composed, it has appealed not only to the expected host of scholars of Greek drama, but also to a fascinatingly free-spirited array of translators, especially since the early 19th century; Percy Bysshe Shelley, Henry David Thoreau, and activist-poet Augusta Webster are among those who have tried their poetic and linguistic powers at rendering it into English. Elizabeth Barrett Browning published not on...