Treat individual causal weights as the author's synthesis; the underlying amendments, tax records, and organizational evidence can corroborate precise claims.
The argument distributes causation across institutions, revenue, political opportunity, and organized interests.
Szymanski identifies several enabling conditions beyond wartime patriotism: the era's growing use of constitutional amendments, the federal income tax's replacement of liquor revenue, expanding dry territory, organizational strategy, and division or weakness among alcohol-industry opponents.
PDF sheet 87
PDF sheet 84
Myth 4 — Structural conditions before and during World War I
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