What is the origin of wrestling?

http://en.wikipedia.org/wiki/History_of_professional_wrestling_in_the_United_States#Expansion_.281920s_to_1930s.29
Wrestling can be traced back to cave drawings in France, but the pro wrestling that we see today is thought to have originated in the late 1800's. It is thought that the first pro wrestling shows were held at carnivals. Contributed by Punkrock Wrestling