In the eighteenth century, “genius” became a ubiquitous word that crystallized a central cultural concern: the question of how human knowledge and the arts advance. Earlier, the term narrowly denoted a talent or inclination, but writers during this period expanded its meaning by associating it with sublimity, with prodigious creative power, and above all, with originality – the ability to produce something that has never been seen or heard before. This chapter traces that intellectual development; and it concludes with a study of the ways that Romantic-era writers built upon the idea by casting the genius as an artist whose deepest influence and social relevance could be fully appreciated only by future generations.