&gt; Economics is a social science, taking measurements &#x2F; accumulating data and theorising on that data causes changes in behaviour. Just sitting around talking about economics, or your weekly budget, drives changes in behaviour.<p>Funny - you could say the same about physics. For example, knowing that the coming car may kill a person causes the human behaviour to change, namely the driver will stop the car. Does that invalidate Newton&#x27;s laws?<p>Yes we probably cannot predict universe totally. But we can do scenarios (of complex emergent systems of interacting agents with bounded rationality), just like in physics. In fact the whole point of doing that analysis is to change behaviour of people, one way or another.