This book studies examples of peace movements of the last 110 years, from the conflict between Norway and Sweden in 1905 to the debate on military intervention in Syria in 2013. It looks at the impact these movements have had on the prevention or the ending of wars. It looks at the impact these movements may have had on the prevention or the ending of wars their own governments were engaging in. - Norway-Sweden 1905 - the movement against the Vietnam war in the 1960s and early 1970s - the movement against the support of the Contras in Nicaragua in the 1980s - the peace movement of the 1980s against nuclear weapons - the case of the Women in White in Liberia in 2002-2003 - the movement against the Iraq war in 1991 - the movement against the Iraq war in 2003.