It is immoral from almost any point of view to refuse to defend yourself and others from very grave and terrible threats, even as there are limits to the means that can be used in such defense.

His theories contributed to the development of the nuclear strategy of the United States. He was a founder of the Hudson Institute think tank and originally came to prominence as a military strategist and systems theorist while employed at RAND Corporation USA. He was known for analyzing the likely consequences of nuclear war and recommending ways to improve survivability; a notoriety that made him an inspiration for the title character of Stanley Kubrick's classic black comedy film satire Dr.