The Industrial Revolution was a period in the late 18th and early 19th centuries when major changes in agriculture, manufacturing, and transportation had a profound effect on socioeconomic and cultural conditions in Britain and subsequently spread throughout the world, a process that continues as industrialisation The onset of the Industrial Revolution marked a major turning point in human social history, comparable to the invention of farming or the rise of the first city-states; almost every aspect of daily life and human society was eventually influenced in some way. In the later half of the 1700s the manual labour based economy of the Kingdom of Great Britain began to be replaced by one dominated by industry and the manufacture of machinery. It started with the mechanisation of the textile industries, the development of iron-making techniques and the increased use of refined coal. Once started it spread. Trade expansion was enabled by the introduction of canals, improved roads and railways. The introduction of steam power (fuelled primarily by coal) and powered machinery (mainly in textile manufacturing) underpinned the dramatic increases in production capacity. The development of all-metal machine tools in the first two decades of the 19th century facilitated the manufacture of more production machines for manufacturing in other industries. The effects spread throughout Western Europe and North America during the 19th century, eventually affecting most of the world. The impact of this change on society was enormous.
The first Industrial Revolution merged into the Second Industrial Revolution around 1850, when technological and economic progress gained momentum with the development of steam-powered ships, railways, and later in the nineteenth century with the internal combustion engine and electrical power generation. The period of time covered by the Industrial Revolution varies with different historians. Eric Hobsbawm held that it ''broke out'' in the 1780s and was not fully felt until the 1830s or 1840s, while T. S. Ashton held that it occurred roughly between 1760 and 1830. Some twentieth century historians such as John Clapham and Nicholas Crafts have argued that the process of economic and social change took place gradually and the term revolution is not a true description of what took place. This is still a subject of debate amongst historians. As might be expected of such a large social change, the Industrial Revolution had a major impact upon wealth. It has been argued that GDP per capita was much more stable and progressed at a much slower rate until the Industrial Revolution and the emergence of the modern capitalist economy, and that it has since increased rapidly in capitalist countries.