In philosophy, genealogy is a historical technique in which one questions the commonly understood emergence of various philosophical and social beliefs by attempting to account for the scope, breadth or totality of ideology within the time period in question, as opposed to focusing on a singular or dominant ideology. Moreover, a genealogy often attempts to look beyond the ideologies in question, for the conditions of their possibility (particularly in Foucault's genealogies). It has been developed as a continuation of the works of Friedrich Nietzsche.