Skip to ContentGo to accessibility page
U.S. History

Introduction

U.S. HistoryIntroduction

Figure 17.1 A widely held belief in the nineteenth century contended that Americans had a divine right and responsibility to settle the West with Protestant democratic values. Newspaper editor Horace Greely, who coined the phrase “Go west, young man,” encouraged Americans to fulfill this dream. Artists of the day depicted this western expansion in idealized landscapes that bore little resemblance to the difficulties of life on the trail.

Introduction

In the middle of the nineteenth century, farmers in the “Old West”—the land across the Allegheny Mountains in Pennsylvania—began to hear about the opportunities to be found in the “New West.” They had long believed that the land west of the Mississippi was a great desert, unfit for human habitation. But now, the federal government was encouraging them to join the migratory stream westward to this unknown land. For a variety of reasons, Americans increasingly felt compelled to fulfill their “Manifest Destiny,” a phrase that came to mean that they were expected to spread across the land given to them by God and, most importantly, spread predominantly American values to the frontier (Figure 17.1).

With great trepidation, hundreds, and then hundreds of thousands, of settlers packed their lives into wagons and set out, following the Oregon, California, and Santa Fe Trails, to seek a new life in the West. They imagined open lands, economic opportunity, and greater freedom to fulfill the democratic vision originally promoted by Thomas Jefferson despite Native American communities living in the region. Whatever their motivation, the great migration was underway. The American pioneer spirit was born.

Citation/Attribution
Reuse and redistribution of this content in digital or print format:
  • This book may not be used in the training of large language models or otherwise be ingested into large language models or generative AI offerings without OpenStax's prior written permission.
  • This book uses the Creative Commons Attribution-NonCommercial-ShareAlike License, which means that you can reuse and modify the material only for noncommercial purposes, must attribute OpenStax, and must distribute any derivative works under the same license.
  • Any commercial printing of this textbook, including using a local or custom printer, must be approved by OpenStax, and proper citation provided.
  • OpenStax-copyrighted images, activities, assessments, and similar components of this book are subject to the same licensing – CC-BY-NC-SA. They can be used for noncommercial purposes with attribution. Commercial use requires permission.
  • Permission requests: Anyone who intends to incorporate this content (including text, images, and other components) into large language models, use it in AI offerings, use it commercially (including in print), and/or has questions about another use case is welcome to complete our reuse request form.
Attribution information
  • If you are redistributing all or part of this book in a noncommercial print format, then you must include on every physical page the following attribution:

    Access for free at https://openstax.org/books/us-history/pages/1-introduction

  • If you are redistributing all or part of this book in a noncommercial digital format, then for every page that includes OpenStax content, you must license the derivative work under the same CC-BY-NC-SA license as the original, and include on every digital page view the following attribution:

    Access for free at https://openstax.org/books/us-history/pages/1-introduction

Citation information

The information below includes the information needed to generate citations in most major styles (APA, MLA, etc.); you must reformat and organize the information as needed to fit the requirements of the style. Use the information below to generate a citation. We recommend using a citation tool such as this one.

© Apr 23, 2026 OpenStax. Textbook content produced by OpenStax is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike License. The OpenStax name, OpenStax logo, OpenStax book covers, OpenStax CNX name, and OpenStax CNX logo, and Rice University name, and Rice University logo trademarks, or wordmarks are not subject to the Creative Commons license and may not be reproduced without the prior and express written consent of Rice University.