Copyright

COPYRIGHT - The legal right given to a writer, composer, artist, or a distributor to exclusive production, sale, or distribution of their work. 

Why does COPYRIGHT exist?
It allows artists to profit from their work.  Profit, in turn, creates an incentive to work and distribute the work.

Creative Commons

A set of licences intended to offer the consumer more freedoms than traditional copyright (sometimes abbreviated CC) 

en.wiktionary.org/wiki/Creative_Commons

Creative Commons (CC) is a nonprofit organization that offers flexible copyright licenses for creative works. ... 

www.gitta.info/website/en/html/website_glossary.html

A new "copyleft license" aimed at flexible handling of copyright protection for all kinds of creative work (books, websites, blogs ... 

www.share.uni-koeln.de/

Creative Commons is a non-profit organization dedicated to allowing creators to easily and freely share their work with others through the use of six basic types of licenses. ... 

www.wpi.edu/about/policies/Copyright/glossary.html