Diplomacy is the art and practice of conducting negotiations between representatives of states. Its main objective is to find, maintain, or improve relations between states. 

The main objectives of diplomacy can be divided into three categories:

1. To resolve differences between countries 
2. To protect and promote the interests of one's own country 
3. To prevent the outbreak of war

The first objective of diplomacy is to resolve differences between countries. This can be done through negotiation, mediation, or arbitration. Negotiation is the most common form of diplomacy and involves the two sides working together to reach an agreement. Mediation is when a third party helps the two sides reach an agreement. Arbitration is when a third party makes a decision that is binding on both sides.

The second objective of diplomacy is to protect and promote the interests of one's own country. This can be done by developing and maintaining good relations with other countries. It can also be done by working to resolve international problems in a way that is favorable to one's own country.

The third objective of diplomacy is to prevent the outbreak of war. This can be done by working to resolve differences between countries before they lead to violence. It can also be done by maintaining a strong military so that other countries will be deterred from attacking. 

The field of diplomacy can be divided into three main areas:

1. Diplomacy as a process
2. Diplomatic agencies and organizations
3. Diplomatic theory

1. Diplomacy as a process

Diplomacy is a process of communication and negotiation between states. It is a way of managing differences and resolving conflict through peaceful means.

The process of diplomacy typically involves four steps:

• Communication: The first step in diplomacy is communication. This involves the exchange of information and ideas between the parties involved.
• Negotiation: The second step is negotiation. This is where the parties involved try to reach an agreement on the issues at hand.
• Agreement: The third step is agreement. This is when the parties involved reach an agreement on the issues at hand.
• Implementation: The fourth and final step is implementation. This is when the agreement reached in the previous step is put into effect.

2. Diplomatic agencies and organizations

There are a number of diplomatic agencies and organizations that play a role in the process of diplomacy.

The United Nations (UN) is one of the most important diplomatic organizations. It is an international organization that works to promote peace and security around the world.

The North Atlantic Treaty Organization (NATO) is another important diplomatic organization. It is an international military alliance that works to protect the security of its members.

The European Union (EU) is another important diplomatic organization. It is an economic and political union of European countries that works to promote peace and prosperity in the region.

3. Diplomatic theory

There are a number of different theories that have been developed to explain the process of diplomacy.

The most important theory is the realist theory of diplomacy. This theory focuses on the state as the main actor in diplomacy. It argues that the state is motivated by its own interests and that the main goal of diplomacy is to further these interests.

The liberal theory of diplomacy is another important theory. This theory focuses on the individual as the main actor in diplomacy. It argues that the individual is motivated by their own interests and that the main goal of diplomacy is to further these interests.

The constructivist theory of diplomacy is another important theory. This theory focuses on the role of ideas in diplomacy. It argues that the ideas that states hold about the world influence their foreign policy and that diplomacy is a way of changing these ideas.

Diplomacy is a complex and important field that plays a crucial role in the relations between countries. By understanding its main objectives, we can better appreciate its importance in the world today.