Maria Rost Rublee of the University of Tampa shows how social psychology's framework for how attitudes and behaviors change can be applied to the Nuclear Nonproliferation Treaty (NPT), which was signed in 1968 to limit the spread of nuclear weapons.

Rublee argues that nuclear forbearance, or compliance with the NPT, is best understood as three different outcomes by social psychology literature: persuasion, identification and conformity. Persuasion is behavior resulting from genuine transformation of preferences, social conformity is behavior resulting from the desire to maximize social benefits, and identification is behavior resulting from the desire or habit of following the actions of an important other.

Japan 's forbearance can be seen as a result of identification. The Japanese have defined themselves in relationship to the United States , not just in defense matters, but politically, economically, and even socially. However, the most compelling reason for Japan 's choices to forgo nuclear weapons is persuasion, based on the larger issue of what it means to be a successful state.

Japan 's faith in the NPT is not because policymakers believe that it will definitely keep other states from pursuing nuclear option, but rather because it furthers the norm they believe in.

Social psychology has also found that the need to both appear and be consistent is a powerful motivator. Once Japan signed the NPT, the nuclear option was largely closed.

Source: Wiley