Modern dance started in the twentieth century by dancers and choreographers who went against the general type of dance that many people liked during that time. They preferred to be viewed as artists rather than just plan dancers. The modern dance became well known and popular as it's own unique type of dance.
A famous choreographer who showed people you can go outside of just ballet and ventured into modern dance.
Martha Graham Technique, solo "Lake," Phyllis Gutelius, Dancer & Choreographer
" Maple Leaf Rag " The Martha Graham Dance Co. interview w/ Blakely White McGuire