And according to the third theory...
And according to the third theory, the main factor responsible for social life is man's intellectual and calculating faculty. According to the first view, sociability is a general and universal goal which man naturally aspires to attain. According to the second theory, sociability is a casual and accidental phenomenon, a secondary and not a primary objective. According to the third theory, sociability is the result of man's faculty of reasoning and calculation.
We have created you male and female, and have made you nations and tribes, that you may know one another [not that on account of this you may boast of being superior to others].
Certainly, the noblest of you, in the sight of Allah, is the most God-fearing among you” (49:13) In this verse, besides an ethical precept, there is an implication which indicates the philosophy of social existence of man, according to which mankind is so created that it always lives in the form of groups, nations and tribes, and an individual is known through his relation to his respective nation and tribe an identity which is an integral part of social existence.
If these relations which in one way, are the cause of commonness and association between individual men, and, in the other way, are the cause of their separation and dissociation did not exist, it would have been impossible to distinguish one man from another. As a consequence, social life, which is the basis of relationships of human beings with one another, would not have come into existence.
These and similar other factors in social life, such as differences in features, colour, and physique, provide the ground for specific marks of distinction of an individual and impart individuality to persons.
Had all the individuals been of the same colour, features, and physique, and had they not been governed by different types of relationships and associations, they would have been like the standardized products of a factory, identical to one another, and consequently could not be distinguished from one another.