Fairytales go back centuries. Hans Christen Andersen was a genius because he didn't just compile fairy stories based on folk lore and myths, he went on to write his own. It is also thanks to Charles Perrault and the Brothers Grimm we have so many of the classic tales written down as we now know the stories.
Fairytales can be adapted. They can be spoofed. They can form the base of longer, more dramatic stories. They can be dark or light. And I love them because, unlike life, justice will prevail in some form.