The moral complexity surrounding intervention is influenced by a broad spectrum of both ethical and practical assumptions and considerations.

The three books reviewed in this essay, Morality Among Nations: An Evolutionary View , Righteous Realists: Political Realism, Responsible Power, and American Culture in the Nuclear Age , and Securing Europe , in some sense represent a reaction to Reagan's ideological policies.

Smith provides a summary of Walzer's work, with particular emphasis on his method of moral argument. Walzer's argument emphasizes the importance of moral judgment based on the principle of human rights rather than on utilitarian calculation.