What was the reason for the constant wars in Europe?

Numerous wars on European territory have arisen for different reasons, which are always the same, wherever the war begins. Many major wars have started over religious divisions, such as the famous Thirty Years’ War in the 17th century. In other wars, political disagreements arose and no one wanted to concede, but they could not agree. Sometimes the reason for the war was the desire to expand their own lands and territories in order to rule and rule.