Just War Theory is a framework for evaluating the morality of war, arguing that it can be justified in certain circumstances, such as self-defense or the prevention of harm to innocent people.

Pacifism is the belief that war is always morally wrong, regardless of the circumstances. Pacifists argue that war is never justified and that there are always non-violent alternatives to resolving conflicts.

Realism is a school of thought in political philosophy that emphasizes the role of power and national interests in international relations. Realists argue that states are primarily motivated by their own self-interest and that war is a natural and inevitable consequence of this.

The concept of a 'just war' is based on the principles of self-defense and the protection of innocent lives. Just War Theory argues that war can be justified in certain circumstances, such as when it is necessary to defend oneself against aggression or to prevent harm to innocent people.

Thomas Aquinas was a medieval philosopher and theologian who is known for his influential work on Just War Theory. His writings on the subject, particularly his Summa Theologica, have had a significant impact on the development of Just War Theory and its principles.

The primary argument against Pacifism is that it is unrealistic and impractical in the face of real-world threats. Critics argue that Pacifism fails to take into account the existence of evil and aggression in the world and that it is sometimes necessary to use force to defend oneself or others.

Niccolò Machiavelli was a Renaissance philosopher and political theorist who argued that war is a necessary evil and that the pursuit of power is a fundamental aspect of human nature. His writings, particularly his book The Prince, have had a significant influence on political thought and the study of power and conflict.

Just War Theory focuses primarily on the justness of the cause and the right to self-defense in evaluating the morality of war. It asks whether the war is being fought for a just cause, whether it is a last resort, and whether the harm caused by the war is proportionate to the harm being prevented.

Immanuel Kant was a German philosopher who argued that war is a rational and legitimate means of resolving conflicts and that the pursuit of justice should be the primary goal of warfare. His writings on the subject, particularly his essay Perpetual Peace, have had a significant impact on the development of Just War Theory and the idea of a just and moral war.

The concept of 'double effect' in Just War Theory refers to the idea that a war can have both intended and unintended consequences. It argues that it is permissible to engage in an action that has both good and bad effects, as long as the good effects are intended and the bad effects are unintended and unavoidable.

Bertrand Russell was a British philosopher and pacifist who argued that war is a form of social pathology and that it can be eliminated through the establishment of a world government. His writings on the subject, particularly his book War and Peace, have had a significant impact on the development of pacifist thought and the pursuit of peace.

The primary argument in favor of Pacifism is that war is always morally wrong and should be avoided at all costs. Pacifists argue that war is never justified and that there are always non-violent alternatives to resolving conflicts.

Thomas Hobbes was an English philosopher who argued that war is a necessary evil and that the pursuit of self-interest is the primary driving force behind human behavior. His writings on the subject, particularly his book Leviathan, have had a significant impact on the development of political philosophy and the study of human nature.

The concept of 'proportionality' in Just War Theory refers to the idea that the harm caused by war should be proportionate to the harm being prevented. It argues that the use of force should be limited to what is necessary to achieve the desired outcome and that the harm caused by the war should not be excessive or disproportionate.

Niccolò Machiavelli was a Renaissance philosopher and political theorist who argued that war is a necessary evil and that the pursuit of power is a fundamental aspect of human nature. His writings, particularly his book The Prince, have had a significant influence on political thought and the study of power and conflict.