Still funny after two thousand years, the Roman playwright Plautus wrote around 200 B.C.E., a period when Rome was fighting neighbors on all fronts, including North Africa and the Near East. These three plays--originally written for a wartime audience of refugees, POWs, soldiers and veterans, exiles, immigrants, people newly enslaved in the wars, and citizens--tap into the mix of fear, loathing, and curiosity with which cultures, particularly Western...