The history of the domestic pig is a tale of both love and loathing. We cherish pigs for the delicious meat they supply. But, as animals that eat and root in filth, swine are often met with contempt. In a new book of porcine history, the writer Mark Essig follows the humble pig’s journey from Neolithic villages to modern industrial farms. Essig joins us Friday to explore the pig’s vast importance, the tragedy of its modern treatment, and its complicated relationship with humanity.