Dora Angela Duncan, known as Isadora Duncan (San Francisco, May 27, 1878 - Nice, September 14, 1927) was an American dancer. Obsessed with dance, she achieved classical perfection and was a constant innovator; at the age of five he announced to his family that he would be a dancer and revolutionary, and he was. He could be a pianist, painter or poet, but in his dance he put all that together. Enemy of ballet, which he considered a false and absurd genre, said that dance should establish a warm harmony between beings and life, and not be just a pleasant and frivolous fun. In his memoirs he wrote that there are three types of dancers: first, who consider dance as a kind of gymnastics composed of funny and impersonal arabesques.