Modern dance is a contemporary dance form that allows free self-expression through movement. It originated in the early 20th century pioneered by Isadora Duncan, Ruth St. Denis, and Ted Shawn. Modern dance is characterized by techniques like improvisation and choreography. It involves basic movements like walks, runs, jumps, leaps, and turns. Duncan's style centered the body as the impulse for motion. Denis and Shawn formed the touring company Denishawn, which trained influential dancers like Martha Graham.