And what later happened in the 1800s, and this was no longer the Agricultural Revolution but the Industrial Revolution, is that the classical economists, and these were Adam Smith, David Ricardo, Karl Marx, the revolutionary, also asked the question "What is value?"
Mais tarde nos anos 1800, e essa já não era mais a Revolução Agrícola mas a Industrial, os economistas clássicos, como Adam Smith, David Ricardo, Karl Marx, o revolucionário, também perguntaram: "O que é valor?"