Explain how corporations, heavy industry, mechanized farming and technological innovation transformed an agrarian economy into an urban industrial society

Learning goal: Explain how the rise of corporations, heavy industry, mechanized farming and technological innovations transformed the American economy from an agrarian to an increasingly urban industrial society between the end of the Civil War and about 1920. Treat the four forces separately, then show how they reinforced one another.

Agrarian and industrial. An agrarian economy is one in which most people earn their living from farming and most wealth comes from land. An industrial economy is one in which manufacturing, mining and related services employ a large share of workers, production is concentrated in factories using machines and power, and most people buy rather than make what they use. In 1870 the United States was still mainly agrarian: most Americans lived in rural areas and farming employed more workers than any other activity. By the census of 1920, for the first time, just over half of Americans lived in urban places (the Census Bureau counted towns of 2,500 or more as urban). The word "increasingly" in the standard matters: the change was a trend over decades, not a switch.

The rise of corporations. A corporation is a business chartered by a state that exists separately from its owners. It raises money by selling shares of stock, and its shareholders have limited liability: they can lose what they invested but are not personally responsible for the company's debts. That feature let corporations gather capital from thousands of investors to build railroads, steel mills and refineries far too costly for a single partnership. Railroads were the first giant corporations; the first transcontinental line was completed at Promontory Summit, Utah, on May 10, 1869.

Business leaders also invented ways to combine companies. John D. Rockefeller founded the Standard Oil Company in Cleveland, Ohio, in 1870. Through horizontal integration, buying or merging with competing refineries, Standard Oil came to control most of the nation's oil refining, and in 1882 its owners organized the Standard Oil Trust to manage the combined companies. Andrew Carnegie built his steel business through vertical integration, owning the iron-ore mines, coal and coke works, railroads and ships that supplied his mills. In 1901 the banker J. P. Morgan combined Carnegie's company with others to form United States Steel, the first corporation capitalized at more than one billion dollars. Public alarm at such combinations led Congress to pass the Sherman Antitrust Act in 1890, though it was weakly enforced for its first decade.

Heavy industry. Heavy industry produces bulky basic goods such as steel, iron, coal and machinery. The Bessemer process, adopted in American mills from the 1860s and 1870s, and later the open-hearth process made steel cheap enough for rails, bridges, skyscraper frames and machines. Steel, coal and oil were connected: coal fired the furnaces, steel built the rails, and railroads carried coal and oil to market. Ohio took part in each: Cleveland in oil refining and steel, Youngstown in steel, and Akron in rubber after B. F. Goodrich moved his company there in 1870.

Technological innovations. Inventions changed how goods were made and how information moved. Alexander Graham Bell received a patent for the telephone in 1876. Thomas Edison, born in Milan, Ohio, in 1847, invented the phonograph in 1877, developed a practical incandescent light bulb in 1879 and, in 1882, a central power station in New York City. Electric motors later replaced steam engines and water wheels in factories. In Dayton, the National Cash Register Company, founded in 1884, built a national sales organization, and Wilbur and Orville Wright, bicycle makers from Dayton, made the first sustained, controlled powered airplane flights on December 17, 1903, at Kitty Hawk, North Carolina. Henry Ford's moving assembly line, introduced in 1913, cut the time needed to build a Model T and made cars affordable to many more buyers.

Mechanized farming. Farming did not disappear; it changed. Steel plows, mechanical reapers and binders, threshing machines and, later, gasoline tractors let one farm family work far more land. Barbed wire, patented in 1874, made it cheap to fence the treeless plains. Railroads carried grain and cattle to distant cities. Output per farm worker rose, so fewer workers were needed on farms. The cost was debt and dependence: farmers borrowed to buy land and machines, sold crops in world markets where prices fell in the 1880s and 1890s, and paid railroads for shipping. Farmers organized the Grange (founded 1867) and later supported the Populist Party (1892) to demand railroad regulation and changes in money policy.

How the four forces reinforced one another. Mechanized farming freed labor that moved to cities; corporations raised capital to build the factories and railroads that hired those workers; technology such as electricity and steel made larger factories and taller city buildings possible; and cities, full of wage earners, became markets for farm produce and factory goods. A worked model: an Ohio farm family in 1880 buys a reaper made in a Chicago factory, which lets two of its four grown children leave the farm. One takes a job in a Cleveland steel mill owned by a corporation; the steel from that mill is sold to a railroad, which carries the family's wheat to market. This is a hypothetical family, but each link describes a real mechanism.

The misconception to avoid. Students often picture industrialization as factories replacing farms. Total farm output rose during these decades. What fell was the share of Americans who farmed. The transformation was one of proportion and of daily life: more Americans worked for wages, for corporations and in cities.

Worked definition in context: Claim: Standard Oil was horizontally integrated and Carnegie Steel was vertically integrated. Test: horizontal integration combines firms at the same stage of production; Standard Oil acquired rival refineries, so it fits. Vertical integration combines the stages of one product's supply chain; Carnegie owned ore mines, coke works, ships and railroads feeding his mills, so it fits. Consequence for each: control of prices in refining, and control of costs and supply in steel.

Worked cause chain: Mechanized farming to urban growth. Step 1: reapers and threshers let fewer workers harvest the same land. Step 2: farm families need fewer children on the farm and face debt when prices fall. Step 3: factory wages in cities attract rural workers. Step 4: cities grow and become markets for farm goods. The step students skip is the second: machines did not only "free" labor, they also added debt that pushed families to seek wages.

Worked use of the 1920 census: Statement: in 1920, for the first time, just over half of Americans lived in urban places. Condition: the Census Bureau defined urban as places of 2,500 or more, so a small town counted as urban. Interpretation: the country had become increasingly urban, but many "urban" Americans lived in small towns, not great cities. The fact and its definition must travel together.

Four-force chart: Make a four-column chart (corporations, heavy industry, technological innovations, mechanized farming). Put each of these in its column with a date: transcontinental railroad, Standard Oil in Cleveland, Standard Oil Trust, telephone patent, electric light, Sherman Antitrust Act, U.S. Steel, Wright brothers' flight, moving assembly line, barbed wire, the Grange. Draw arrows for at least three connections between columns and label each arrow with the mechanism.

Independent performance: Write a 400-word explanation of how the United States moved from an agrarian to an increasingly urban industrial society. Success criteria: defines agrarian, industrial, corporation and limited liability; gives at least one dated example for each of the four forces, including one from Ohio; explains at least two ways the forces reinforced each other; uses the 1920 census with its definition of urban; and states one cost of the transformation for farmers.

Ohio case study: Choose one Ohio city (Cleveland, Akron, Dayton or Youngstown). Using the dates in this lesson, write five sentences explaining which of the four forces shaped its growth, which corporation or innovation was most important there, and where its workers came from. Mark any sentence that is your inference rather than a fact from the lesson.