Charles E. Grinnell

Charles E. Grinnell was a nineteenth-century American theologian whose critical examination of religious extremism in *Fanaticism* contributed significantly to contemporary debates about the boundaries between authentic faith and destructive zealotry. His work emerged during a period of intense denominational competition and revivalist fervor in the United States, offering a measured theological perspective on the psychological and social dimensions of religious excess. Grinnell's scholarly approach helped establish frameworks for distinguishing between legitimate spiritual conviction and pathological religious behavior that influenced subsequent American religious thought.