What are the causes of interstate conflicts in modern conditions? What international organizations are called

What are the causes of interstate conflicts in modern conditions? What international organizations are called upon to prevent and resolve these conflicts?

Scientists call the causes of international conflicts: competition between states; mismatch of national interests; territorial claims; social injustice on a global scale; uneven distribution of natural resources in the world; negative perception of each other by the parties; personal incompatibility of leaders, etc. Different terminology is used to characterize international conflicts: “hostility”, “struggle”, “crisis”, “armed confrontation”, etc. There is still no generally accepted definition of an international conflict due to its diversity.