Causal order is frequently used in some branches of science. Particularly at the earlier stage of scientific development causal explanation was considered to be the sole object of scientific inquiry to explain a phenomenon or a class of facts.

This causal explanation involves a temporal span between two phenomena related as cause and effect. Generally from the popular or common-sense notion of cause emerged a scientific view of cause.

Some philosophers like Mill identified the causal order as the sole purpose of scientific induction. For inductive generalisations based on causal connection are most dependable. But with the progress of science the causal explanation is not given supreme importance as it was done at the earlier stage of scientific progress.

It is accepted as one kind of explanations. But there are other explanations as well. Of course in some areas like medical science, sociology, history etc. causal explanation is very common. In medical science attempts are frequently made to find out the cause of diseases in order to prevent them.

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In sociological studies causal explanation is sought to know the background of some social events. In some cases causal explanation is not that easy because of the intricacy or complexity of the phenomenon sought to be explained.

A genius having great reflective insight can discover the cause of a natural phenomenon after a lot of investigation or by trial and error.

Theoretically the causal relation is temporal in nature for the cause always precedes the effect and the effect comes after the cause. Causal relation is also an invariable association between two phenomena. Causal relation is also an asymmetrical one.

Causal order introduces systematic presentation of phenomena arid is considered to have higher explanatory power than the classificatory order.