18th Amendment was started by Australian denim importer Rachel Rose who named it after the American law Prohibition that banned the sale of alcohol. The collection is inspired by the glamorous and decadent era that followed. Jeans are named after movie stars of the past such as Lauren Bacall, Judy Garland, Ginger Rogers and Gina Lollobrigida.. They are also one of the brands that are responsible for introducing the new trend for high-waisted jeans.