In this dissertation, I examine antagonistic relationships between women writers in the first half of the eighteenth century, focusing on the works of Delarivier Manley, Martha Fowke Sansom, Eliza Haywood, and Laetitia Pilkington. Professional rivalry among women writers represents an under-studied but vital element of the history of print culture in the early eighteenth century. I argue that the shared burden of negotiating the complicated literary marketplace did not, as critics have at times suggested, inspire women who wrote for print publication to feel for one another a sisterly benevolence. Rather, fine gradations in social class, questions of genre status and individual talent, and -- perhaps most importantly -- clashing literary ambitions spurred early eighteenth-century women writers into vicious rivalries recorded in print and driven by print culture. Women documented their literary battles in poems, in prefaces, and in autobiographical texts replete with self-justification and with attacks on former friends or disappointing patronesses. This dissertation recognizes rivalry as a crucial mode of interaction between eighteenth-century literary women and analyzes the ways in which these professional women writers labored to defend themselves not just against patriarchal pressures but against one another. In doing so, it contributes to the construction of a more complete literary history of the first half of the eighteenth century by exploring how early eighteenth-century women writers imagined their own professional lives, how they imagined the professional lives of other women, and how they therefore believed themselves influenced (or claimed themselves influenced) by the support or detraction of other women. The first two chapters of this dissertation focus on Delarivier Manley's career and writings, while the second two address the entangled writing lives of Eliza Haywood and Martha Fowke Sansom. The concluding chapter briefly examines Laetitia Pilkington's Memoirs. I investigate the way these women employed the practice of life-writing as a means of self-construction, self-promotion, and public appeal. / text