There are two Isidores in the Catholic canon of saints: Isidore the Farmer, a simple 12th-century workhand and the patron of farmers and laborers, and Isidore of Seville, a 7th-century scholar who attempted to document the entirety of human knowledge and is patron saint of the Internet. Both Isidores haunt Martín Zimmerman’s Seven Spots on the Sun, a moving anti-war polemic now playing at Rattlestick Playwrights Theater, which charts the lingering depredations of civil conflict on the dispossessed members of an imagined Latin American village.