We have the technological innovation from the Industrial Revolution, things like electricity and steam power. You see the notion of capitalism come into its prime, this focus on where do you maximize your returns for a given amount of capital that you have. And land is a form of capital, but as we will see, as we saw in some of those pictures, as technology becomes more and more valuable, things other than land become very important forms of capital, like factories, like railroads, like ships. And related to these two ideas, you have industrialization, which is the use of technology to become more productive, to increase output, and they all feed off of each other. A capitalist says, how do I get a better return on my capital? Well, I should industrialize. I should make my factories more efficient.