Jean Georges Noverre (1727-1810)

French ballet master who brought great reforms the the art of ballet. 
He fought for expressiveness in the dance at the time when dancers and ballet masters were content with performing steps merely for the sake of physical movement. 

Noverre declared the art of ballet to be imitative of life as acting is. He was responsible for many costume reforms as well. 

His Letters on Dancing and Ballet, first published in 1760 and republished many times since with translations into many languages, had enormous influence and improved ballet productions throughout Europe.