Frederick Jackson Turner is one of the most famous historians in American history, and his essays on the Western frontier at the end of the 19th century are still analyzed by scholars and viewed as the authoritative commentary on the "closing" of the frontier and the end of Westward expansion. From the intro: "In republishing these essays in collected form, it has seemed best to issue them as they were originally printed, with the exception of a few slight corrections of slips in the text and with the omission of occasional duplication of language in the different essays. A considerable part of whatever value they may possess arises from the fact that they are commentaries in different periods on the central theme of the influence of the frontier in American history. Consequently they may have some historical significance as contemporaneous attempts of a student of American history, at successive transitions in our development during the past quarter century to interpret the relations of the present to the past. Grateful acknowledgment is made to the various societies and periodicals which have given permission to reprint the essays. Various essays dealing with the connection of diplomatic history and the frontier and others stressing the significance of the section, or geographic province, in American history, are not included in the present collection. Neither the French nor the Spanish frontier is within the scope of the volume."