 Major Substantive Contributions As we are discussing Ibn Khaldun's Major Substantive Contributions, his first major contribution regarding the development of the discipline of political sociology, all have the consensus that the theory of Aspia is basically an Arabic word which originally means spirit of kinship i.e. when you are associated with a particular tribe, a particular tribe, you get a feeling of affiliation with it. You understand that your growth is actually your identity. So Ibn Khaldun's philosophy of Aspia, that is his major contribution in the discipline specifically. Because in the family or the tribe, when you believe that you are the part of the family and you are the part of the tribe, then your responsibilities, your responsibilities, the chain of your rights and duties, are especially associated with your growth. So even in a lot of Ahadiths, because it is mentioned in terms of identity, although there are many more people who write it, they understand that the theory of Aspia of Islam is different and Ibn Khaldun and the original Islamic philosophy is there. There are also some differences, but because the way Ibn Khaldun has explained the whole theory, we cannot deny its relevance or importance. So the term became famous as a result of the use to which it was put by Ibn Khaldun, who made this concept a basis of his interpretation of history and his doctrine of the state. Now the reason for this is that the theory of Aspia that Ibn Khaldun has presented is not in the context of religion, but rather in the sense that as we study the date, as we see how the state comes into existence, then first of all, if the people who have a tribe, have a identity, they will sit somewhere together and they will become the foundation. And then they will develop together and as they will move forward, they are the spirit of Ibn Khaldun's philosophy. Because according to Ibn Khaldun, the fundamental bond of human society is Aspia. And the basic motive or, this is the basic motive or force of history. As such the term has been translated as a spirit de-corp. That is actually the meaning that the nationalistic feeling of a specific group and it is also even present in the modern time period. Because even in today's era, the debate of nationalism is still going on. So he is the inventor of the theory and it is a force which unites the people with one another and this leads to the creation of the state. People get together by joining their minds and values and create solidarity among themselves which leads to Aspia. Because Aspia means a feeling of oneness according to Ibn Khaldun. And when does this happen? When people live together, their family is one, their tribe is one, and when they live together and recognize each other's identity, recognize each other's role, then the feeling of oneness and the importance of Ibn Khaldun has given his philosophy. And the basic factor of this Aspia force is to unite the people together in a term of a society or in the term of a state. Now this feeling of oneness is also present in the society and in the creation of the state we can see a very important role. So he says the emotion of similarity which keep the people of a group united together having common, effective actions. When people get together, when they are feeling together, we can see actions as well. He said mutual relation is also the base of the society which is also stated as the source of Aspia and solidarity is very important in state and society.