What is the exact origin of the contemporary dance?

It seems that American dancers as Loie Fuller, Isadora Ducan , Ruth St. Denis, Martha Graham, Doris Humphrey and the German Mary Wigman they was feeling too many restrictions on the ballet to expressed. Despite that originated by different artists but they say that it started in the first performances of Loie Fuller (in Paris) and Isadora Duncan (London). It’s very strange to see as Loie Fuller began to contemporary dance from work in the transformation of his body in a flower or a butterfly. While Isadora Duncan used ideals greek art achieve to more natural forms of dance. His strange death while she was driving and her scaf tangled up until to strangle it an her convincing life make she a mythical figure.

Loie Fuller

Isadora Duncan