Late last month, People for the Ethical Treatment of Animals, better known as PETA, sent a letter to George Lucas, requesting that he make the culinary offerings at the new Lucas Museum of Narrative Art 100% vegan. “Greetings from your many fans here at PETA,” the open letter begins. “Just as your films have inspired generations to imagine a better universe, your new museum has the power to set a shining example here on Earth by serving only vegan food in its restaurants.” Lucas is not a known vegan, and PETA has no reason to think that he would honor...