For the international association of socialist parties of the late 19th century, see Second International (politics) and a successor organization, the Socialist International
For one of the Merriam-Webster dictionaries of American English, see Webster's New International Dictionary, Second Edition
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The SecondInternational was an organization formed in 1889 (after several years of preparation) by socialist and labour parties who wished to work together for international socialism.
The SecondInternational dissolved during World War I, as the separate national parties that composed it did not maintain a unified front against the war, instead generally supporting their respective nation's role.
Additionally, the SecondInternational was not as revolutionary as the later Third and Fourth Internationals, in most countries supporting the legitimacy of electoral rule.