Period 6 runs from 1865 to 1898 - the Gilded Age 镀金时代. Industry, migration, and the West transform the country, and every transformation produces a political argument about who benefits.

Improvements in mechanization 机械化 raised agricultural production substantially, while railroads carried crops to national and world markets. But the same forces squeezed farmers: consolidation in agricultural markets 农产品市场集中化 left them facing high freight rates, expensive credit, and falling crop prices.

Westward settlement also meant the final dispossession of American Indians. Federal policy moved from treaties to reservations 保留地 and then to assimilation 同化 through the Dawes Act 道斯法, which divided communal land into individual plots and transferred the surplus to settlers.

Industrial growth involved technology, management, a growing workforce, wider markets and pro-growth government policies. Businesses used new corporate structures 公司组织形式, including trusts and holding companies, for consolidation 合并: bringing firms under concentrated control.

Try it — distinguish mechanisms. Teacher-written cases: A business adopts new machinery and management methods to produce more goods. Several firms are brought under a large trust or holding company. Better transport and communication connect producers with more distant markets. Explain which changes production, which changes ownership, and which changes market access. Which most directly shows consolidation?

Worked mechanisms. New technology and management could raise output; more goods alone do not prove that fewer owners control an industry. Trusts and holding companies concentrated control over businesses and wealth. Transport and communication connected producers with wider markets. Businesses also sought markets and natural resources outside the United States. These mechanisms could interact; they are not interchangeable labels for growth.

Try it — assess two claims. Teaching evidence paraphrased from CED Topics 6.6–6.7: many goods became cheaper, workers' real wages increased, and many Americans could afford more goods and services. At the same time the gap between rich and poor grew, and consolidation concentrated wealth. Claim A says that if workers could buy more, inequality must have fallen. Claim B says that if inequality grew, no worker's living standard could improve. Assess both, distinguishing purchasing power from the distribution of wealth.

Worked judgment. Lower prices could let wages buy more goods and services. Living standards could improve without workers becoming as wealthy as business owners. Wealth could become more concentrated while many workers' purchasing power improved, so neither claim follows. Improved affordability also did not end disputes over wages and working conditions.

Some defended laissez-faire 自由放任, arguing that competition promoted long-term growth and opposing government intervention during economic downturns. This was a policy argument; it does not mean government was absent from industrial development. Pro-growth government policies also helped industrial growth. Many living standards improved alongside rising inequality 不平等加剧; downturns and labour conflicts prompted debates over policy.

A variety of perspectives 各种不同的立场 on the economy and labour developed. Workers faced long hours, dangerous conditions, and wages that fell during downturns.

They organised. Unions such as the Knights of Labor 劳工骑士团 and the American Federation of Labor 美国劳工联合会 differed over who to admit and what to demand - the AFL concentrating on skilled workers and practical gains in wages and hours. Strikes 罢工 were frequent, often large, and frequently broken by state or federal force, which itself became an argument about the role of government.

International and internal migration increased urban populations and fostered the growth of cities 城市.

New arrivals came increasingly from southern and eastern Europe 南欧与东欧, alongside Chinese migration to the West - which met the Chinese Exclusion Act 排华法案, the first significant federal restriction on immigration by nationality.

In cities where access to power was unequally distributed, political machines 政治机器 provided jobs, housing help, and services in exchange for votes - corrupt by later standards, and for many migrants the only functioning source of support.

Migration also produced organised hostility. Nativist movements argued that new arrivals threatened wages, culture, or self-government.

Corporations' need for managers 管理人员 and for male and female clerical workers 文职人员 expanded a new middle class 中产阶级, with new patterns of consumption and leisure.

Cultural and intellectual movements both buttressed and challenged 既支持又挑战 the social order:

• Social Darwinism 社会达尔文主义 used evolutionary language to justify inequality as natural.
• The Gospel of Wealth 财富福音 argued that the wealthy had a moral obligation 道德义务 to use their fortunes for the public good.
• Agrarians, utopians, socialists, and artists criticised industrial society from the other direction.
• Many women sought greater equality, often through voluntary organizations 自愿团体 - temperance, settlement houses, and suffrage work.

The major parties appealed to lingering divisions from the Civil War and competed over patronage 政治分肥 more than policy, producing close elections and limited legislation.

Economic instability drove agrarian activists to build the People's (Populist) Party 人民党, demanding government action: regulation of railroads, currency reform, and a graduated income tax. Populism failed as a party but placed on the agenda the idea that government should intervene in the economy - the argument Period 7 takes up.

Debates over citizenship 公民身份, race, and the role of government ran through all of this, as the rights promised during Reconstruction continued to be narrowed.