Were most of Disney's hit movies based on ancient Fairy Tales?

What makes a story a Fairy Tale? How did two brothers create 100's of Fairy Tales? Did people once believe in Witches, Fairies and Giant Ogres? For free home activities sign-up at www.WhoSmarted.com See Privacy Policy at https://art19.com/privacy and California Privacy Notice at https://art19.com/privacy#do-not-sell-my-info .