As we will see many times in this book, economies based on the repression of labor and systems such as slavery and serfdom are notoriously noninnovative. This is true from the ancient world to the modern era. In the United States, for example, the northern states took part in the Industrial Revolution, not the South. Of course slavery and serfdom created huge wealth for those who owned the slaves and controlled the serfs, but it did not create technological innovation or prosperity for society.
