The document summarizes 6 technological revolutions from approximately 1770 to the present: 1) The first industrial revolution from 1770 introduced technologies like iron, machinery, and the mechanized cotton industry alongside infrastructures like canals, waterways, and factories. 2) The second industrial revolution from 1830 brought steam engines, steam power, railways, and telegraph networks. 3) From 1875, the third industrial revolution utilized technologies such as cheap steel, steamships, heavy industry, and electrical equipment alongside global shipping, railways, telegraph, and telephone networks. 4) The fourth industrial revolution from 1908 featured internal combustion engines, mass production, oil, petrochemicals, electricity, and management tools supported by roads, ports