The form, content, and practice of history has shifted including changes in conceptualization and practice that came in viewing history as social science, critiques and reconstructions of historical forms of knowledge, and debates about form, format, genre, and discourse. The central argument of this essay begins with the claim that history is a distinctive discipline. It's distinction lies not only, or even primarily, in its subject matter or materials. Rather, history is distinct as a form of inquiry and mode of understanding, with distinguishing characteristics of historical context and historical imagination. Important implications follow