 “Methods Continuity,” by contrast, demands only that philosophical theories emulate the methods of inquiry of successful sciences. “Methods” should be construed broadly here to encompass not only, say, the experimental method, but also the styles of explanation (e.g., identification of causes that determine, ceteris paribus, their effects) employed in the sciences. Such a view does not presuppose the methodological unity of the various sciences, only that successful sciences have some methodological uniqueness, even if this is not exactly the same across all the sciences. Historically, Methods Continuity has constituted the most important type of naturalism in philosophy; it is found in writers like Spinoza, Hume, and Nietzsche. (However, unlike the contemporary M-naturalists who draw on the actual results of established sciences, many historical M-naturalists drawn to Methods Continuity simply try to emulate a scientific way of understanding the world in developing their philosophical theories.)