National Prohibition arose from a long coalition-built institutional pathKansas constitutionalizes state prohibition before National ProhibitionThe Anti-Saloon League built a national organization from local and electoral strategyThe Eighteenth Amendment moved from congressional submission to ratification and delayed effectWartime prohibition created a temporary national alcohol regime before the Eighteenth Amendment took effectThe 1919 National Prohibition Act created the federal enforcement framework and 0.5-percent definition1880–1920
United States
Provides a verified, non-monocausal framework that distinguishes long-term organizing and state action from wartime acceleration and the final constitutional and statutory milestones.
Research hold closed 2026-09-01. Nine dated subevents now anchor the period with complete institutional and primary sources. The period start moved from the editorial 1870 anchor to the verified Kansas milestone in November 1880. Preserve qualifications about uneven state enforcement and the interpretive weighting of causes.
National Prohibition emerged through an institutional sequence spanning state constitutional precedents, organized national pressure, congressional and state constitutional action, temporary wartime restrictions, federal implementing legislation, and the beginning of enforcement.
Verified period model
National Prohibition did not arrive as a single wartime decision. The verified sequence begins with state constitutional prohibition in Kansas, follows the growth of the Anti-Saloon League from Ohio to a national pressure organization, then moves through congressional submission and state ratification of the Eighteenth Amendment, temporary wartime restrictions, enactment of the National Prohibition Act, and the beginning of legal enforcement on January 17, 1920.
Dated subevents
- November 1880 — Kansas ratifies constitutional prohibition.
- 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.
- November 21, 1918 — Wartime Prohibition Act is enacted.
- January 16, 1919 — Eighteenth Amendment is ratified.
- June 30, 1919 — Wartime restrictions begin.
- October 28, 1919 — National Prohibition Act becomes law over veto.
- January 17, 1920 — Constitutional Prohibition takes effect.
Publication guardrails
- Do not treat World War I, the Anti-Saloon League, or any single constituency as the sole cause.
- Keep constitutional ratification, federal certification, statutory implementation, and operative enforcement dates distinct.
- Attribute the 0.5-percent threshold to the National Prohibition Act, not the Eighteenth Amendment.
- State legal adoption separately from actual enforcement outcomes.
Evidence status
The linked broad claim and all five exact subclaims are Supported, Strong, High-confidence, Verified, and citation-ready. Complete source copies are preserved in Notion.