The U.S. government on Thursday unveiled an 18-count indictment against WikiLeaks founder Julian Assange, charging him under the 1917 Espionage Act for his role in the 2010 publication of a trove of secret documents relating to the Iraq and Afghanistan wars and diplomatic communications regarding dozens of nations. So extreme and unprecedented are the indictment’s legal theories and likely consequences that it shocked and alarmed even many of Assange’s most virulent critics.