You have limited markets on your islands, but what if you could sell to the hundreds of millions of people who aren't directly in your country? This desire for more raw materials and cheaper raw materials, and this desire to sell your goods, the outputs of industrialization, this, to a significant degree, drove this imperialism, this colonization, and in general, a motivation for freer trade in general. When the free trade didn't happen freely, sometimes it was forced on the country that was being traded with. And as alluded to already, the technology which helped fuel this Industrial Revolution also made it easier to control a far-flung empire. Before the Industrial Revolution, a country like the United Kingdom being able to control this far-flung empire, this would have been impossible for the Romans or the Persians to do using their technology. But now you have the steamship, you have railroads, you have the telegraph, which are parts of this Industrial Revolution, but they also allow you to project power and project power much quicker and much more efficiently than ever possible. So once again, technology, industrialization, and capitalism, these were the fuel of the Industrial Revolution.