Creative Commons licenses, for example, and copyright are not mutually exclusive. In fact, it is common practice to use the © symbol on a book's copyright page when using a CC license.
Thus, what is the difference between a copyright and license, and between copyright infringement and violation of the terms of a license?
cf. the § "IP as Contract" of Stephen Kinsella's CC BY-licensed work Against Intellectual Property, in which he shows, inter alia, that licenses are not necessarily mutually binding contracts