Important of History of Economic Thought

It has been shown above that there is a close relationship between economic history and the history of economic thought. The question arises about the importance of the study of the latter – a history spread over a lengthy period of about 2,500 years, at a time when we are already faced with numerous economic problems awaiting solution. It is important as it has the following advantages:-
a)The history of economic thought clearly demonstrates a continuous development of economic ideas from the very early times of human civilization down to the present day. It also enable one to realize the true position of economic as a separated subject , related to other social science. Sometimes people demand beautiful things, here economic is related to aesthetics.  What is uneconomical is immoral because  economics and ethics are closely related. In the beginning social values were the same. Therefore, in order to have a clear picture of the economic life of the ancients and medieval one has to study this subject.
b)Economic ideas, as they have development from time to time, have been instrumental in shaping the economic and political policies of different countries. The study will , therefore , reveal the various phases of their economic development which makes possible the study of a comparative history.
c)It is a fact that  history repeats itself. The history of economic thought provides the modern generation with the solutions to modern problem. Even nation has a separate political economic entity. Its interests and conditions are quite different from those of others. Hence, the importance of economic nationalization which was propounded by mercantilism. When the U.S.A, Germany and India were faced with the deadly ghost of foreign competition, in the 18th, 19th, and 20th centuries honor, the same policy was advocated, in a modified from by H.C Carey, Frederic list and M.G, Ranade. It is the preservation of the history of economic thought that handed down the old remedy of protection to the generations.
d)Ideas when they are judged by the criterion of dogmatic absolutism, are not studied properly as they are not applicable to modern social conditions. But when the same economic ideas are studied by the criterion of relativity I, e, in relation to time and place, their critical examination reveals their utility. They become real. Medieval thinkers were not wrong when they condemned the realization of interest because in those days money was borrowed for consumption purposes. As religion dominated economic thought and as morality was highly appreciated , profit earning in the form of interest was not considered justified. In modern tines. When industrial and commercial development have taken place, Money is mostly borrowed for investment as a result of which businessmen and investor high profits. The lender must get remuneration for his waiting and sacrifice. It is, then, the changed circumstances in which the theories of profit have been proceed and the charging of interest is justified , thus, the concept of relativity provides a sense of realistic approach. The history of economic thought brings out an important truth-that emphasis should be laid on the development of economic ideas and not on personalities.