Though it's tempting to attribute the Long Peace to nuclear deterrence, non-nuclear developed states have stopped fighting each other as well.

WSJ: Steven Pinker: Why Violence Is Vanishing

The new strategy will emphasize reducing reliance on the role of nuclear weapons in deterrence, and will commit to accelerating the deployment of non-nuclear deterrent capabilities, such as missile defenses and the forward deployment of U.S. forces to trouble spots.

WSJ: U.S. Keeps First-Strike Nuclear Strategy

However, the Nuclear Triad has been integrated with non-nuclear strategic capabilities, which strengthen the credibility of U.S. offensive deterrence and form the New Triad.

CENTERFORSECURITYPOLICY: US Nuclear Stockpile

The solution to Iran's search for the means to nuclear deterrence lies in a comprehensive regional approach based on universal principles of non-proliferation, safeguards and international inspections.

ECONOMIST: Letters

Likewise, the administration's declaration that it would not unleash nukes on non-weapons states that lived by the rules of the Nuclear Non-Proliferation Treaty (NPT) was criticised either for being unwise (because it curtailed deterrence against biological and chemical weapons), or misleading (because it is so full of loopholes that it does not curtail deterrence much at all).

ECONOMIST: Nuclear diplomacy: Chain reaction | The