All Arthur Miller's plays are brilliant critiques of the immorality of capitalism. All My Sons, written in 1947, is no exception. It is from a true story. In 1941-43, Wright Aeronautical Corporation conspired with army inspection officers to approve defective aircraft engines destined for military use, resulting in planes crashing and pilots dying. Miller had been told of a daughter turning her father in after he had been caught selling the faulty machinery to the army.