1950s–1970s
United States
Provides the essential downturn between wartime/postwar prominence and the premium revival that began in the 1980s.
Do not publish exact sales shares, a single date of market leadership, or brand-level proof changes without contemporaneous trade data. The 1968 light-whiskey legal decision remains a separate Research Hold.
Vodka and other lighter-tasting spirits gained favor while American whiskey producers lowered proofs and pursued lighter product responses during a severe category contraction.
What changed
From the postwar decades through the 1970s, changing drinking patterns favored vodka and other lighter-tasting spirits. American whiskey producers lowered bottling proofs, emphasized younger or lighter profiles, and experimented with light whiskey, yet the category still contracted sharply.
Why it matters
The decline explains the inventory, product, and cultural conditions from which the 1980s premium revival emerged.
Publication boundary
Keep exact market shares and brand-level timelines out of the public narrative until contemporaneous market and trade records are added. Treat the federal light-whiskey decision as a separate legal event.