Alex Garland’s dystopian, state-of-the-nation action film Civil War isn’t even on general release yet but it has still managed to provoke a certain amount of debate on social media.

Civil War also stars Wagner Moura, Cailee Spaeny, Stephen McKinley Henderson and Sonoya Mizuno, and much of the cast was seeing the film for the first time at the Austin premiere. "I need a second ...