“During the course of this long volume I have undoubtedly plagiarized from many sources–to use the ugly term that did not bother Shakespeare’s age. I doubt whether any criticism or cultural history has ever been written without such plagiary, which inevitably results from assimilating the contributions of your countless fellow-workers, past and present. The true function of scholarship as a society is not to stake out claims on which others must not trespass, but to provide a community of knowledge in which others may share.” -F. O. Matthiessen, American Renaissance 1941.
To that I have nothing to add . . . .