Ice dance (sometimes referred to as ice dancing) is a discipline of figure skating that historically draws from ballroom dancing. It joined the World Figure Skating Championships in 1952, and became a Winter Olympic Games medal sport in 1976. According to the International Skating Union (ISU), the governing body of figure skating, an ice dance team consists of one woman and one man. Ice dance, like pair skating, has its roots in the "combined skating" developed in the 19th century by skating clubs and organizations and in recreational social skating. Couples and friends would skate waltzes, marches, and other social dances. The first steps in ice dance were similar to those used in ballroom dancing. In the late 1800s, American Jackson Haines, known as "the Father of Figure Skating", brought his style of skating, which included waltz steps and social dances, to Europe. By the end of the 19th century, waltzing competitions on the ice became popular throughout the world. By the early 1900s, ice dance was popular around the world and was primarily a recreational sport, although during the 1920s, local skating clubs in Britain and the U.S. conducted informal dance contests. Recreational skating became more popular during the 1930s in England. The first national competitions occurred in England, Canada, the U.S., and Austria during the 1930s. The first international ice dance competition took place as a special event at the World Championships in 1950 in London. British ice dance teams dominated the sport throughout the 1950s and 1960s, then Soviet teams up until the 1990s. Ice dance was formally added to the 1952 World Figure Skating Championships; it became an Olympic sport in 1976. In the 1980s and 1990s, there was an attempt by ice dancers, their coaches, and choreographers to move ice dance away from its ballroom origins to more theatrical performances. The ISU pushed back by tightening rules and definitions of ice dance to emphasize its connection to ballroom dancing.