Psychologist

Below is part of the answer to the query "why are there wars in the world, when will people calm down":
War is a complex issue with many causes. Some of the most common reasons for war include:
Conflict over resources: Wars are often fought over access to land, water, or other resources.
Political disagreements: Wars can also be caused by disagreements between countries or groups about political issues, such as who should be in power or how a country should be run.
Religious differences: Wars can also be caused by religious differences, such as disagreements about the interpretation of sacred texts or the role of religion in society.
Ethnic tensions: Wars can also be caused by ethnic tensions, such as disagreements about the rights of different ethnic groups or the division of land.
Nationalism: Wars can also be caused by nationalism, which is the belief that one's own nation is superior to others.