Before revision: Menninger described soldiers who were not openly defiant but expressed their civil disobedience (what he called "aggressiveness") by “ passive measures, such as pouting, stubbornness, procrastination, inefficiency, and passive obstructionism" due to what Menninger saw as an "immaturity" and a reaction to "routine military stress".
After revision: Menninger described soldiers who were not openly defiant but expressed their civil disobedience (what he called "aggressiveness") by " passive measures, such as pouting, stubbornness, procrastination, inefficiency, and passive obstructionism" due to what Menninger saw as an "immaturity" and a reaction to "routine military stress".