This music was used in Fantasia to expound upon the theory of evolution.
Remember, this was in 1941.
While Disney did a fantastic job of making animation, even if the subject is evolution, there was actually a hilarious (Italian humor) parody of the Disney segment in another animated movie, called Allegro Non Troppo, which used Ravel’s Boléro.
http://www.youtube.com/watch?v=f6aM7st6Xsw