Duncan's dance became a revolutionary dance at that time, which was first reflected in her worship of nature. There is a slogan "Return to Nature" in the romantic movement, which is a curse to the decadent culture of modern cities and a praise to nature. This has become a feature of romantic literature and art. The worship of nature was still a new trend at that time, and Duncan's dance thought was formed under the influence of this trend. She threw away her ballet shoes, took off her tightly wrapped ballet skirt and walked barefoot. She created the form of free dance with her own artistic practice and explored a new way for modern new dance.
Although Duncan created the spirit of freedom and liberation for modern dance and tried to practice her dance theory that "the movement of the body must develop into the natural language of the soul", this new dance form has no movement law. The so-called "natural movement" just refers to unconstrained movement. Duncan also lacks a systematic movement system and prescribed dance steps when teaching students to dance. This deficiency was made up after the Swiss music educator E Jacques Dalcroze founded the "excellent rhythm" training system and R von Laban founded the modern dance theory.
Modern dance originated from Duncan, and Laban further developed it and made great contributions to the theoretical construction of modern dance. He has many theoretical works, which comprehensively discuss the laws of people's physical and mental activities in dance movements, including the relaxation and tightening of muscles and the coordination of movements. There are famous theories such as dance space in stage performance. These theories and practices laid the foundation for modern dance. M. Wiegmann, a student of Laban, turned Laban's theory and rules into dance works through practice, which made modern dance theory more concrete and played an extremely great role in promoting the development of dance all over the world.