Book summary

アメリカ史におけるフロンティアのあらすじ

著者：フレデリック・ジャクソン・ターナー

読了7分
10 key ideas
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An 1890 census note says the frontier line can no longer be drawn, and one historian asks what that ends.

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アメリカ史におけるフロンティアの概要

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読書時間: 約7 h 10 min5 h 40 min fast, 8 h 30 min slow
所要時間: 102,100語
ライブラリ内の難易度: 読み応えがあります long sentences, a rich vocabulary
初版刊行年: 1920by フレデリック・ジャクソン・ターナー

Reading time at 238 words a minute (fast 300, slow 200). 古典を読むのにかかる時間 · 更新日 22 October 2026

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アメリカ史におけるフロンティア in short

Turner's argument is simple to state. Americans did not just carry European institutions across the ocean. At the edge of free land they stripped those institutions down and rebuilt them, again and again as the frontier moved west.

What アメリカ史におけるフロンティア is about

What if the shape of a nation came from a line on a map? In 1890 the census office announced that settlements had broken up the unsettled area, so no frontier line could be drawn any longer. Frederick Jackson Turner read that notice as the close of a great chapter.

The Frontier in American History gathers thirteen essays and addresses, published together in 1920. Each one returns to one theme. Free land at the edge of settlement, Turner argues, made Americans who they are. You get his main ideas in the order he builds them.

対象読者. Readers who like big ideas about how nations form, who enjoy American history told through settlers and landscapes, and who want the thesis behind debates about democracy.

The 10 key ideas

Key idea 1 · free to read
Start from the Great West, not the coast
Turner opens with a short government notice. The census office of 1890 stated that a frontier line could no longer be traced. He reads this as the end of a great movement. Until then, he argues, American history is largely the story of settling the Great West.
Other peoples grew inside a limited area and then met other nations. The United States is different. Each time settlers reached a new region, the whole process began again from simple beginnings. So Turner asks readers to stand not on the Atlantic coast but in the Great West.
This shifts the question you ask of the past. You ask where people could go when they were unhappy. A country with open land behaves differently from one without it.
Takeaway: American history is best understood as the story of free land and of settlers who kept moving onto it.
2
Each new frontier restarted American society afresh
Turner defines the frontier as the meeting point of wilderness and settled life.
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3
Traders, ranchers and farmers crossed the land in waves
Turner asks you to stand at Cumberland Gap and watch a procession file past.
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4
The frontier pulled the young nation together
Turner claims that the frontier worked against sectionalism.
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5
Free land bred democracy and its dangers
Turner calls the promotion of democracy the frontier's most important effect.
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6
New England's first frontier already looked western
The second essay goes back to 1690, when a Massachusetts committee recommended a frontier line with garrisons.
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7
The Old West split coast from interior
Turner names the Old West the region between the coastal settlements and the lands beyond the Alleghenies, from about 1676 to 1763.
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8
The Middle West and the great valleys took center stage
Turner defines the Middle West as the north central states from Ohio to the Dakotas.
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9
The West was a form of society, and democracy was its gift
In The Problem of the West, Turner says the West is a form of society and not an area.
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10
Pioneer ideals must now be carried forward by new means
The last essays ask what remains once the frontier is gone.
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『アメリカ史におけるフロンティア』についての質問

What is The Frontier in American History about?

It collects essays and addresses by Frederick Jackson Turner arguing that free land and westward settlement shaped American institutions, democracy and character. The essays follow the frontier from the Atlantic coast to the Middle West and ask what its closing means.

What is the frontier thesis?

It is Turner's idea that the repeated experience of settling free land at the edge of the nation made Americans individualistic, inventive and democratic, and set them apart from Europeans. Each new frontier started society over again.

What did Turner mean by the frontier?

He meant the moving edge of settlement, the near boundary of free land, and not a fortified border like those in Europe. The census treated it as the line where population reached at least two people per square mile.

When was The Frontier in American History written?

Turner wrote the essays over about twenty-five years and published them together in 1920. The first essay, about the end of the frontier, dates from the 1890s, and the later ones respond to the early twentieth century.

What is the main message of the book?

The main message is that American democracy grew from experience on free land, and that when the land ran out the nation had to find new ways to protect equality, opportunity and the faith of ordinary people in self-government.

この版を引用します

Turner, Frederick Jackson. The Frontier in American History. Library of Alexandria, 2026, libraryofalexandria.com/products/the-frontier-in-american-history.

Turner, F. J. (2026). The frontier in American history. Library of Alexandria. https://libraryofalexandria.com/products/the-frontier-in-american-history (Original work published 1920)

Turner, Frederick Jackson. The Frontier in American History. Library of Alexandria, 2026. https://libraryofalexandria.com/products/the-frontier-in-american-history.

@book{turner2026frontier,
  author = {Turner, Frederick Jackson},
  title = {The Frontier in American History},
  publisher = {Library of Alexandria},
  year = {2026},
  url = {https://libraryofalexandria.com/products/the-frontier-in-american-history},
  note = {First published 1920}
}