In this monograph, Steffen Ducheyne provides a historically detailed and systematically rich explication of Newtons methodology. Throughout the pages of this book, it will be shown that Newton developed a complex natural-philosophical methodology which encompasses procedures to minimize inductive risk during the process of theory formation and which, thereby, surpasses a standard hypothetico-deductive methodological setting. Accordingly, it will be highlighted that the so-called Newtonian Revolution was not restricted to the empirical and theoretical dimensions of science, but applied equally to the methodological dimension of science. Furthermore, it will be documented that Newtons methodology was far from static and that it developed alongside with his scientific work. Attention will be paid not only to the successes of Newtons innovative methodology, but equally to its tensions and limitations. Based on a thorough study of Newtons extant manuscripts, this monograph will address and contextualize, inter alia, Newtons causal realism, his views on action at a distance and space and time, the status of efficient causation in the /Principia/, the different phases of his methodology, his treatment of force and the constituents of the physico-mathematical models in the context of Book I of the /Principia/, the analytic part of the argument for universal gravitation, the meaning and significance of his regulae philosophandi, the methodological differences between his mechanical and optical work, and, finally, the interplay between Newtons theology and his natural philosophy.