Yet according to others this name came to be in vogue when...
Yet according to others this name came to be in vogue when the issue whether the Holy Qur'an (called " kalamullahi ") ,the Divine Utterance[^5] , i.e. the Holy Qur'an) is created ( makhluq ) or not, became a matter for hot debate amongst the Muslim - a controversy which led to animosity between the two opposite camps and bloodshed of many. This is also the reason why that period is remembered as a "time of severe hardship" - mihnah .
That is, since most of the debates about the doctrines of the faith revolved around the huduth (createdness, temporality) or the qidam (pre-eternity) of the "Utterance" or kalam of God, this discipline which discussed the principal doctrines of the faith came to be called " 'ilm al-kalam " (lit. the science of the Utterance). These are the various opinions that have been expressed about the reason why*'ilm al-kalam* was given this name.
The Various Schools of Kalam: The Muslims differed with one another in matters of the Law ( fiqh ), following differing paths and dividing into various sects, such as Ja'fari, Zaydi, Hanafi, Shafi'i, Maliki and Hanbali, each of which has a fiqh of its own. Similarly, from the viewpoint of the doctrine, they divided into various schools, each with its own set of principal doctrines. The most important of these schools are: the Shi'ah, the Mu'tazilah , the ' Asha'irah , and the Murji'ah.
Here it is possible that the question may arise as to the reason behind such regretful division of the Muslims into sects in matters dealing with kalam and fiqh , and why they could not maintain their unity in these spheres. The difference in matters of kalam causes disunity in their Islamic outlook, and the disagreement in the matter of fiqh deprives them of the unity of action. Both this question and the regret are justified.
But it is necessary to pay attention to the two following points: (i) The disagreement in issues of fiqh among the Muslims is not so great as to shatter the foundations of the unity of doctrinal outlook and mode of practice. There is so much common in their doctrinal and practical matters that the points of difference can hardly inflict any serious blow.
(ii) Theoretical differences and divergence of views is inevitable in societies in spite of their unity and agreement in principles, and as long as the roots of the differences lie in methods of inference, and not in vested interests, they are even beneficial; because they cause mobility, dynamism, discussion, curiosity, and progress.