The first step in upholding justice and law is to establish a set of laws for your realm. This includes laws regarding succession, crime, and punishments. A stable legal system helps to maintain order and prevents your vassals from acting on their own accord. It is also important to appoint capable judges and a strong law enforcement system, such as a constabulary. This ensures that your laws are being enforced and justice is being served.
When your laws are broken, it is important to have a system of punishments in place. However, punishment alone might not be enough to deter future crimes. Rehabilitation is equally important. It is essential to provide education and training to prisoners to help them become productive members of society upon their release. You can also offer pardons and amnesties to those who have served their sentence and are ready to rejoin society.
As a ruler, it is important to respect the rights of your people. This includes allowing them to practice their religion freely and to have a say in the running of the realm. Implementing a council system, where the most influential vassals have a say in important decisions, helps to balance power and ensure that the needs of the people are being addressed. In addition, you can improve the lives of your people by investing in infrastructure, such as roads and hospitals.
Upholding justice and law also involves maintaining good relations with foreign rulers. Treaties and alliances can help to prevent unnecessary wars and maintain peace between realms. It is important to negotiate in good faith and to respect the sovereignty of other rulers. However, when necessary, it is also important to defend your realm and to take action against those who threaten your people.
In conclusion, upholding justice and law is an essential responsibility for any ruler in Crusader Kings III. A stable legal system, a strong law enforcement system, and a focus on rehabilitation and respect for the rights of the people are all necessary for a just and fair realm. Maintaining good relations with foreign rulers through treaties and alliances is also important for maintaining peace. By following these principles, you can ensure that your realm is stable, prosperous, and respected by others.