Industrial Revolution started in UK during the 1750's and diffused to the rest of Europe, America, and the world.
One of the main causes for IR is the agricultural revolution. Due to the agricultural revolution, there were plentiful of food and less need for men power. Therefore, people move to cities to work at factories.
Also, UK had the necessary raw materials to create machinery and factories.
There was also an enlightenment idea, which created capitalism and more competition between business owners. So, owners had to be innovative and invent to be the best
There were several other causes for IR: population growth, colonies and markets, merchant marine, navigable rivers and ports, and capital.