This thesis explores Friedrich Nietzsche's use of history for philosophical purposes, focusing on two central themes in Nietzsche's writings: the genealogical methodology, and perspectival epistemology. My aim is to demonstrate how Nietzsche's concept of "historical philosophizing" is intricately connected to his moral philosophy. Using a genealogical methodology, Nietzsche traces the historical development of moral concepts back to their foundations, unveiling the underlying power structures and complex mechanisms that underpin moral discourse. Additionally, perspectival epistemology challenges conventional notions of truth and objectivity, serving as a critique of moral semantics. I argue that these elements are interconnected and should be studied as parts of a unified whole. By providing insights into an overlooked theme in Nietzschean methodology, this essay may enrich our understanding of his philosophy as well as contribute to broader debates within contemporary philosophy.