trate, assume that two poets, each ignorant of the other, compose identical poems. Neither work is novel, yet both are original and, hence, copyrightable. See Sheldon v. Metro-Goldwyn Pictures Corp., 81 F. 2d 49, 54 (CA2 1936).
Originality is a constitutional requirement. The source of Congress’ power to enact copyright laws is Article I, § 8, cl. 8, of the Constitution, which authorizes Congress to “secur[e] for limited Times to Authors . . . the. exclusive Right to their respective Writings.” In two decisions from the late 19th century — The Trade-Mark Cases, 100 U. S. 82 (1879); and Burrow-Giles Lithographic Co. v. Sarony, 111 U. S. 53 (1884)—this Court defined the crucial terms “authors” and “writings.” In so doing, the Court made it unmistakably clear that these terms presuppose a degree of originality.
In The Trade-Mark Cases, the Court addressed the constitutional scope of “writings.” For a particular work to be classified “under the head of writings of authors,” the Court determined, “originality is required.” 100 U. S., at 94. The Court explained that originality requires independent creation plus a modicum of creativity: “[W]hile the word writings may be liberally construed, as it has been, to include original designs for engraving, prints, &c., it is only such as are original, and are founded in the creative powers of the mind. The writings which are to be protected are the fruits of intellectual labor, embodied in the form of books, prints, engravings, and the like.” Ibid, (emphasis in original).
In Burrow-Giles, the Court distilled the same requirement from the Constitution’s use of the word “authors.” The Court defined “author,” in a constitutional sense, to mean “he to whom anything owes its origin; originator; maker.” 111 U. S., at 58 (internal quotation marks omitted). As in The Trade-Mark Cases, the Court emphasized the creative component of originality. It described copyright as being limited to “original intellectual conceptions of the author,” 111 U. S., at 58, and stressed the importance of requiring an author who accuses another of infringement to prove “the exist