From Wikipedia..."Bartender Neal Murray says he created the cosmopolitan in 1975 at the Cork & Cleaver steak house in Minneapolis. According to Murray, he added a splash of cranberry juice to a Kamikaze and the first taster declared, "How cosmopolitan." This event supposedly led to the naming of the new beverage." True or not, we like this story. The libation gained popularity again in the 90s, when we were all going crazy for anything in a martini glass.