“The Brave Bull emerged in the mid-20th century as a tequila-based variation of the Black Russian. It gained popularity in the 1960s and 1970s during tequila's rise outside Mexico. Some sources suggest it may have been named after the 1951 film "The Brave Bulls," though this isn't definitively proven. Another theory attributes its creation to Kahlúa marketing efforts to promote their liqueur with tequila. The cocktail played a significant role in elevating tequila's perception from a shot spirit to one suitable for sipping and savoring in sophisticated, spirit-forward drinks.”