What are the reasons for any conflict between people. The subject of the conflict, why does the conflict occur?

The basis of any conflict is a contradiction or clash of goals and interests of people. The main contradiction, over which people come into confrontation, is the subject of conflict. For example, the subject of a conflict can be the possession of power (position, influence) or any material goods (money, property). Often conflicts arise over issues affecting the value spheres of life. For example, a conflict may arise on religious or linguistic grounds.