Jazz dancing, and its steps and style, originated from the dancing of African Americans that were brought to America as slaves. Originally, the term jazz dance encompassed any dance done to jazz music, including both tap dance and jitterbug. Jazz dance can refer to these specific styles or allude to theatrical or character dance. Some people think Jazz dance produced modern jazz, but really, Modern dance came more as a response against Ballet. Two main branches of Modern dance were pioneered through Martha Graham and Isadora Duncan.