John Wayne might've been an ornery cuss. He might've made the worst film of his career in support of the Vietnam War at a moment when it was clear to anyone with two eyes and a conscience that the conflict was a moral and logistical sinkhole. He was a racist.
But he never wrote a single movie he performed in, and, from everything I've read about him, tailored movies to fit his persona -- i.e. what he thought audiences expected from him as a movie star. "The Green Berets" is an outlier. For...