India Pale Ale (IPA) — The Hop Revolution's Icon
IPA's origin story — beer brewed stronger and more heavily hopped to survive the sea voyage to British troops in India in the late 18th century — is partially myth. George Hodgson of Bow Brewery, London, did supply heavily hopped 'October Beer' to the East India Company from around 1780, and the style did travel to India and back. The British Pale Ale tradition predates this. The American IPA revolution began at Sierra Nevada in the 1980s.
India Pale Ale is the defining beer style of the craft beer revolution — a highly hopped ale originating in 18th-century England that has evolved into the most diverse and commercially significant beer style of the 21st century, spawning dozens of sub-styles from Session IPA (3.5–4.5% ABV) to the extreme Double/Triple IPA (8–12% ABV). The style's defining characteristic is hop bitterness, measured in International Bitterness Units (IBU), and the aromatics contributed by late hopping and dry hopping — processes that add hops after or during cooling to maximise aromatic compounds (myrcene, linalool, geraniol) without increasing bitterness. The American craft beer movement, led by Sierra Nevada Brewing (Celebration Fresh Hop Ale, 1981), Dogfish Head (60/90/120 Minute IPA), Ballast Point (Sculpin IPA), and Three Floyds (Zombie Dust), transformed the British IPA into a distinct American style characterised by citrus, tropical fruit, and pine aromatics from Pacific Northwest and American hop varieties (Cascade, Centennial, Citra, Mosaic, Simcoe).