A set of four Greek tragedies presents two linked concerns: a trilogy that traces a hereditary curse on a royal household, beginning with a triumphant commander’s return and assassination, followed by his son’s vengeful matricide, and culminating in a divine tribunal that shifts private blood-feud into civic justice; and a separate drama about a defiant immortal who endures punishment for aiding humanity against celestial authority. Together the plays examine law and vengeance, the transmission of guilt across generations, the limits of divine power, and the moral tensions between personal retribution and emerging public order.