Use the chapter-specific citations for the interpretive synthesis and the independent institutional/primary citations for Kansas, the Anti-Saloon League, the constitutional sequence, wartime prohibition, the National Prohibition Act, and the January 17, 1920 operative date.
Thompson2020TemperanceGoals — PDF sheets 14–15Thompson2020TemperanceGoals — PDF sheets 28–31Thompson2020TemperanceGoals — PDF sheets 31–34Coker2020ReligiousConservatives — PDF sheets 37–40Szymanski2020WorldWarI — PDF sheets 78–81Szymanski2020WorldWarI — PDF sheets 84–87Szymanski2020WorldWarI — PDF sheets 88–89Schrad2020UniquelyAmerican — PDF sheets 166–167Kansas Historical Society — November 1880 prohibition amendmentWesterville History Museum — Anti-Saloon League founding and strategyNational Archives — Eighteenth Amendment submission, ratification, and delayed effectFederal Judicial Center — Wartime Prohibition Act chronologyNational Prohibition Act, 41 Stat. 305 — enactment and wartime enforcementNational Prohibition Act, 41 Stat. 307–308 — 0.5-percent definitionNational Prohibition Act, 41 Stat. 323 — veto overrideLibrary of Congress — Prohibition chronology — January 17, 1920The Eighteenth Amendment emerged from decades of temperance and prohibition organizing, dry local and state policy, Anti-Saloon League electoral strategy, coalition building, fiscal and constitutional change, and shifting political opportunity; World War I accelerated this path but did not originate it.
Exact institutional and legal milestones were independently corroborated with complete sources from the Kansas Historical Society, Westerville Public Library and Museum, National Archives, Federal Judicial Center, Library of Congress, and the complete National Prohibition Act.
Institutional path to National ProhibitionKansas ratifies constitutional prohibitionOhio Anti-Saloon League formsNational Anti-Saloon League is officially foundedCongress submits the Eighteenth Amendment to the statesWartime Prohibition Act is enactedEighteenth Amendment is ratifiedWartime Prohibition restrictions beginNational Prohibition Act becomes law over presidential vetoConstitutional Prohibition takes effectThe institutional path is now strongly anchored, but causal weight remains interpretive. Present the Anti-Saloon League, state precedents, wartime acceleration, coalition politics, and constitutional/statutory steps as interacting mechanisms; do not make any single factor the sole cause.
Thompson distinguishes temperance from the League's focused program; Coker documents coalition breadth; Szymanski reconstructs prewar policy and structural conditions and treats the war as catalyst. Schrad independently reaches a parallel catalyst conclusion in the international comparison.
Promoted to High confidence and Verified on 2026-09-01 after complete-source review and creation of nine dated supporting events. The World War I catalyst interpretation remains qualified rather than monocausal.
Thompson — temperance was broader than prohibitionThompson — the Anti-Saloon League adopted a modern organizational modelThompson — single-issue balance-of-power politics disciplined candidatesCoker — Prohibition support crossed religious and ideological linesSzymanski — national Prohibition rested on a long prewar pathSzymanski — fiscal and political changes opened the constitutional routeSzymanski — World War I accelerated rather than created ProhibitionSchrad — World War I catalyzed an existing international movementKansas ratifies constitutional prohibition in November 1880Ohio and national Anti-Saloon League founding datesThe League used nonpartisan elections and local optionCongress submits the Eighteenth Amendment and states ratify itThe Eighteenth Amendment delayed its operative prohibition for one yearWartime prohibition was enacted after the armistice and began June 30, 1919The National Prohibition Act enforces wartime prohibitionThe Volstead Act defines intoxicating liquor at 0.5 percent ABVCongress passes the National Prohibition Act over Wilson’s objectionsLibrary of Congress timeline — enforcement begins January 17, 1920Evidence basis
The interpretive synthesis is now independently anchored by complete institutional and primary sources. Kansas supplies a state constitutional precedent; the Ohio and National Anti-Saloon League dates show organizational growth and issue-focused electoral pressure; the National Archives establishes congressional submission, ratification, and the constitutional delay; the Federal Judicial Center distinguishes wartime enactment from its effective date; the complete National Prohibition Act supplies the statutory framework and 0.5-percent definition; and the Library of Congress anchors January 17, 1920 as the beginning of legal enforcement.
Verified milestone chain
- November 1880 — Kansas ratifies constitutional prohibition; implementing law takes effect May 1, 1881.
- May 24, 1893 — Ohio Anti-Saloon League forms.
- December 18, 1895 — National Anti-Saloon League is officially founded.
- December 18, 1917 — Congress submits the Eighteenth Amendment to the states.
- November 21, 1918 — Wartime Prohibition Act is enacted.
- January 16, 1919 — Eighteenth Amendment is ratified.
- June 30, 1919 — Wartime Prohibition restrictions begin.
- October 28, 1919 — National Prohibition Act becomes law over presidential veto.
- January 17, 1920 — Constitutional Prohibition becomes operative and legal enforcement begins.
Qualifications
This evidence strongly verifies the institutional and legal sequence, but it does not convert a complex historical outcome into a single-cause story. State action, organized pressure, religious and political coalitions, fiscal change, wartime acceleration, and constitutional procedure must remain distinct and proportionate to their evidence.
Drafting rule
Use the exact dated subevents for chronology. Use this claim only for the higher-level synthesis, with World War I described as an accelerator rather than the origin of the movement.