The Industrial Revolution

After the Civil War, the railroad was built and owned by private owners to help inter-state commuters and trade. The first batch of railroads was made of iron, and Carnegie developed a new "King Steel" business. Replace damaged rails with rails. Carnegie acquired the new steel industry and became "the largest company in the United States". By 1900 Americans had more railway miles than Russia and Europe. Due to investment in Carnegie's new machines, skilled workers have been replaced to reduce lower prices and costs.

Secondary Industrial Revolution: The Second Industrial Revolution, also known as the "Technology Revolution", was a relatively large industrial revolution during the latter half of the 19th century and during the First World War. It is thought that it began with Bessemer Steel. In the 1860's, it reached a climax in mass production and production lines. The second industrial revolution, also known as the "technical revolution", was the last industrialization of the last one-third of the 19th century and the beginning of the 20th century. The first industrial revolution ended in the mid-19th century, and before the second industrial revolution in 1870, the slowdown in macro inventions exacerbated it. Although some of its characteristic events can be traced back to early manufacturing innovations like the invention of the Bessemer process of 1856, the Second Industrial Revolution usually started in 1870 until the beginning of World War I It was between 1914.

By convention, the Industrial Revolution ended around 1840. The Second Industrial Revolution - characterized by the emergence of large scale production and electrification - began around 1870. Then there was a computer and a third industrial revolution. Now, I think many people are experiencing the fourth industrial revolution brought about by artificial intelligence, automation, and new genetic technologies. These phases certainly have to cope meaningfully to the year of the development of our technology and industry. But from all perspectives of human history over 200,000 years it is more meaningful to pull back the lens and observe the four industrial revolution and treat them as the four stages of the event. In other words, the four stages of the industrial revolution began around 1800 and are ongoing.