Marvel’s “Captain America: Civil War” begins and ends with its lead character Steve Rogers, aka Captain America (Chris Evans). After another incident involving the Avengers results in collateral damage, political pressure mounts to install a system of accountability. The new status quo fractures the Avengers, resulting in two camps—one led by Steve Rogers and his desire for the Avengers to remain free to defend humanity without government interference, and the other following Tony Stark’s (Robert Downey Jr.) surprising decision to support government oversight and accountability.