Modern dance developed in the early twentieth century, partly in reaction to the traditional, more highly technical forms of dance such as ballet. Modern dance in America was pioneered by Ruth St. Denis and Martha Graham during the 1920s, 1930s, and 1940s and rose to prominence in the 1950, 1960s, and 1970s with outstanding choreographers such as Alvin Ailey and Bob Fosse. Whereas Contemporary incorporates lyrical, modern, ballet and jazz. This style of dance is all about connecting the mind and the body through dance movements. It is typically done barefoot and there is a heavy emphasis on strong controlled legwork. This style often allows the dancer creative freedom, and can be danced to a variety of different music.