Major Inventions of the Industrial Revolution: The Machines That Built the Modern World
The Industrial Revolution is remembered above all for its inventions. The new machines and processes developed in late eighteenth and early nineteenth century Britain did more than speed up production; they changed the relationship between humans and the natural world, transformed the scale and organization of economic life, and laid the foundation for the modern industrial economy. The pages below cover the most important of these inventions, with links to detailed articles on each.
The Steam Engine
The single most important invention of the Industrial Revolution was the steam engine. By converting heat from burning coal into mechanical motion, the steam engine freed production from dependence on water and wind and made possible a new generation of industries based on railways and steamships. The development of the engine from Thomas Newcomen’s atmospheric pumping machine of 1712 to James Watt’s separate condenser in the 1760s and 1770s is one of the great stories of applied science. Watt’s improvements, in particular, multiplied the engine’s efficiency and made it economical for a wide range of uses, from driving factory machinery to propelling locomotives. By the early nineteenth century, the steam engine had become the universal power source of British industry.
Textile Machines
The first industry to be transformed by new inventions was the textile industry. A series of innovations in the second half of the eighteenth century mechanized the spinning and weaving of cotton, wool, and flax. The spinning jenny, invented by James Hargreaves around 1764, allowed a single worker to spin multiple threads at once, vastly increasing the productivity of spinning. Richard Arkwright’s water frame, patented in 1769, produced a stronger thread suitable for the warp of cloth, and Samuel Crompton’s mule, developed in the 1770s, combined the best features of both. Weaving was mechanized by Edmund Cartwright’s power loom, patented in 1785 and gradually improved over the following decades. By the early nineteenth century, an industry that had once been organized around rural handicraft workers had been concentrated in large mechanized mills.
The Cotton Gin
In the United States, Eli Whitney’s invention of the cotton gin in 1793 made it possible to process short-staple cotton quickly and cheaply, dramatically increasing the profitability of cotton cultivation. The cotton gin helped to entrench the system of plantation slavery in the American South, and it tied the American South firmly into the British industrial economy as a supplier of raw cotton. The story of the cotton gin and its consequences is a striking example of how the same invention could have very different effects in different societies.
Iron and Steel Processes
The Industrial Revolution required iron in huge quantities, and a series of innovations in the eighteenth and early nineteenth centuries made iron cheaper and more abundant. The substitution of coke for charcoal in smelting, pioneered by Abraham Darby at Coalbrookdale, gradually transformed the British iron industry. The puddling process, developed by Henry Cort in the 1780s, allowed pig iron to be converted into wrought iron more cheaply and efficiently. The result was a steady fall in the price of iron and a rapid expansion of the iron industry, especially in regions like South Wales, the West Midlands, and the Scottish Lowlands.
In the second half of the nineteenth century, the development of the Bessemer process and the open hearth process made possible the mass production of steel, an even stronger and more versatile material. The story of steel and mass production is one of the central chapters of the second Industrial Revolution.
The Railroad
The most visible product of the new industrial technology was the railway. Beginning with the Stockton and Darlington Railway of 1825 and especially the Liverpool and Manchester Railway of 1830, railways spread rapidly across Britain, Europe, and North America. The development of the steam locomotive, from early experiments by Richard Trevithick to the famous Rocket of George Stephenson in 1829, opened an age of rapid transport that transformed the movement of goods and people and created entire new industries in its wake.
The Telegraph
Closely tied to the railroad was the telegraph, which used electricity to send messages almost instantaneously over long distances. The development of the telegraph by Samuel Morse and others in the 1830s and 1840s, together with the Morse code system that carried its messages, made it possible to coordinate the movement of trains across great distances, allowed businesses to communicate with branches and suppliers in real time, and gave newspapers a powerful new tool for reporting events from around the world.
The Internal Combustion Engine
The internal combustion engine, developed in the late nineteenth century, became one of the defining technologies of the second Industrial Revolution. By burning fuel directly inside a cylinder, the internal combustion engine provided a more compact and powerful source of energy than the steam engine. It made possible the automobile and the airplane, and it eventually replaced steam as the dominant source of motive power for transport.
The Importance of the New Inventions
What made these inventions so important was that they allowed production to increase on a scale that had never been possible before, beyond merely replacing older methods. A single spinning jenny could produce as much yarn as many hand spinners, a single power loom could do the work of several hand weavers, a single steam engine could do the work of dozens of horses, and a single railway could move more goods in a day than a fleet of horse-drawn wagons. Productivity soared, prices fell, and the volume of goods available to ordinary people grew dramatically.
The new inventions also transformed the organization of work. The factory system, with its concentration of workers, machinery, and power in a single building, was a direct consequence of the new technologies. It changed the rhythms of working life, brought together large numbers of workers under one roof, and created the industrial working class that would play a central role in the politics of the nineteenth century.
Continuing Innovation
One of the most striking features of the Industrial Revolution was the sheer pace of invention. In the half century after 1760, the rate at which new technologies were introduced and old ones improved was unprecedented. This pace of innovation was itself the product of several factors, including the spread of scientific knowledge, the development of an infrastructure of invention, the growth of a market for new technologies, and the willingness of entrepreneurs to invest in untested ideas. The result was a culture of invention that has persisted into our own time and that continues to drive economic change.
The Patent System and the New Inventions
The British patent system, reformed by the Patent Act of 1852 and consolidated in the Patents, Designs, and Trade Marks Act of 1883, was an important institutional support for the new inventions. The number of British patents granted rose from about 50 per year in the 1750s to 250 per year in the 1830s, 1,000 per year in the 1850s, and 13,000 per year in the 1880s. The American patent system, reformed by the Patent Act of 1836 and extended by the Patent Act of 1952, saw a similar increase: from about 300 patents per year in the 1830s to 2,000 per year in the 1860s, 20,000 per year in the 1890s, and 50,000 per year by 1910. The German patent system, established by the Reichspatentgesetz of 1877, was the model for the European systems, and the Paris Convention for the Protection of Industrial Property of 1883 established the basic international framework. The relationship between patent protection and the rate of invention has been a long-running debate in economics, with William Landes and Richard Posner’s The Economic Structure of Intellectual Property Law (2003) being the standard modern treatment.
Why Britain? The Macroeconomic Conditions
The classic question of the Industrial Revolution is why it happened first in Britain and not in France, the Netherlands, China, or India, all of which had advanced economies and capable merchants in the 18th century. The traditional answer, derived from Arnold Toynbee and T. S. Ashton, emphasized the British political and institutional environment: the relative absence of absolute monarchy, the protection of property rights, the openness of the British class system, the strength of the patent system, the existence of a national market freed from internal tariffs by the Acts of Union. The newer answer, associated with Robert C. Allen in The British Industrial Revolution in Global Perspective (2009) and with the cliometric literature, emphasizes the macroeconomic conditions: British wages were the highest in the world in 1800, British coal and energy prices were the lowest, and the high wages combined with the low energy prices made the substitution of capital for labor profitable in Britain before it was profitable elsewhere. The third answer, associated with Kenneth Pomeranz in The Great Divergence (2000), emphasizes the role of the New World colonies: the slave trade, the silver of Potosí, the sugar of the Caribbean, and the land of the American frontier. The three answers are not mutually exclusive, and the most sophisticated recent work, including Joel Mokyr’s The Enlightened Economy (2009), combines elements of all three.
The Geography of Industrialization
The Industrial Revolution began in Britain, and within Britain it began in a particular part of the country: the Midlands, the North of England, South Wales, and the Scottish Lowlands. The principal industries — cotton, wool, iron, coal, and engineering — were concentrated in a few regions, and the location of these regions was determined by the geography of coal and water. The coalfields of the Midlands (Warwickshire, Staffordshire), the North (Lancashire, Yorkshire, Durham, Northumberland), South Wales, and the Scottish Lowlands (Lanarkshire, Midlothian) were the principal centers, and the major industrial cities of Manchester, Birmingham, Leeds, Sheffield, Glasgow, and Newcastle grew up on or near them. The continental European industrialization followed a similar pattern, with the major industrial regions of Belgium (the Sambre-Meuse), the German Ruhr, the Czech Ostrava-Karvinna basin, the French Nord-Pas-de-Calais, and the Silesian basin (shared by Germany and Poland) all located on or near major coalfields. The American industrialization, by contrast, was concentrated in the Northeast (New England, New York, Pennsylvania), in the Great Lakes region (Ohio, Michigan, Illinois), and on the coal and iron fields of Appalachia. The geography of industrialization is the subject of Brian J. L. Berry’s The Human Consequences of Urbanisation (1973) and of Malcolm J. Proudfoot’s The Major Public Works of Great Britain, 1789-1847 (1954).
The Persistence of the Industrial Revolution in Modern Growth
The question of whether the Industrial Revolution is the central event of modern history, or one event among many, is the central question of modern economic history. The standard view, derived from Simon Kuznets, Angus Maddison, and the “long 19th century” tradition, is that the Industrial Revolution marks a discontinuous break in the human economic record, and that the 200-fold increase in world per capita income since 1800 is unprecedented in the previous 10,000 years of human history. The revisionist view, associated with E. A. Wrigley in The Population History of England, 1541-1871 (1981) and with Gregory Clark in A Farewell to Alms (2007), is that the Industrial Revolution was a continuation of the longer-term trend of organic growth, and that the 19th century was a period of slow rather than fast growth. The most recent view, associated with Deirdre McCloskey in The Bourgeois Virtues (2006) and Bourgeois Equality (2016), is that the Industrial Revolution was the consequence of a fundamental change in values, in which the “dignity of the ordinary person and the liberty to engage in the bourgeois virtues” became the central cultural commitment of the modern West. The three views are not mutually exclusive, and the question is still being debated in the 2020s.
The Standard-of-Living Debate in 21st-Century Form
The major inventions of the Industrial Revolution are the central case study in the “great divergence” debate that has dominated global economic history since 2000. The standard question — why did the Industrial Revolution happen in Britain and not elsewhere? — has been reformulated by the new literature as: why did the combination of new technologies, new institutions, and new social arrangements that produced the Industrial Revolution develop in one particular place and time? The standard answer, derived from the Humphries and Mokyr work on the Industrial Revolution, is that the British combination of high wages, low energy costs, secure property rights, and a culture of practical inquiry made the new technologies profitable in Britain before they were profitable elsewhere. The alternative, derived from Pomeranz’s Great Divergence and from the Allen work, emphasizes the role of the New World colonies in providing the cotton, sugar, and other primary products that the British economy consumed. The debate is unresolved, and it is the most active area of research in the field. The current state of the debate is summarized in the essays collected by Stephen Broadberry and Kevin H. O’Rourke in The Cambridge Economic History of Modern Europe (2010) and in the ongoing work of the Economic History Society and the Cliometric Society.