How can one become a scientist, an economist, a historian…? Does it simply involve reading many books on the subject? Does it involve observing, thinking and doing experiments?

Science involves experiments, analysis, hypothesis and conclusions. By simply reading we can just get facts but cannot get the reasons behind a particular result. Many diseases which were thought to be incurable in the past have been overcome by means of scientific inventions and discoveries.
Subjects like History or Economics may not be regarded as science in vague terms. But if we go deep in these subjects, we find that Economics is a science of human behaviour and paradoxes. Either it is observing of human behaviour or historical building. It is the experiment which enables us to form scientific theory.

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