Peace is not the absence of conflict but the presence of creative alternatives for responding to conflict — alternatives to passive or aggressive responses, alternatives to violence.

Source and credibility

Dorothy Thompson very probably did not say this. Wikiquote lists it as misattributed.

Source: A statement of Jeanne Larson which became widely attributed to Thompson after its appearance just below an actual quote and citation of Thompson in Seeds of Peace (1986), edited by Jeanne Larson, p. 261.
Source quality: Precise citation Points to a specific work with a page, chapter, date or similar locator, so you can look it up.

Dorothy Thompson's Political Guide: A Study of American Liberalism and its Relationship to Modern Totalitarian States (1938)

The New Russia (1928)

Dorothy Thompson's Political Guide: A Study of American Liberalism and its Relationship to Modern Totalitarian States (1938)

Dilemma of a Pacifist (1937)

Dorothy Thompson's Political Guide: A Study of American Liberalism and its Relationship to Modern Totalitarian States (1938)

Dorothy Thompson's Political Guide: A Study of American Liberalism and its Relationship to Modern Totalitarian States (1938)

Dorothy Thompson's Political Guide: A Study of American Liberalism and its Relationship to Modern Totalitarian States (1938)