Plato believed that the primary goal of a just society is to foster the development of intellectual and moral virtues among its citizens, thereby creating a harmonious and virtuous community.

Aristotle argued that the highest good for humans is to live a life of moral virtue and ethical excellence, which involves cultivating virtues such as courage, temperance, justice, and wisdom.

The social contract theory posits that individuals enter into an implicit or explicit agreement with each other to form a society and government, thereby surrendering certain rights in exchange for the benefits of living in a structured and orderly community.

Thomas Aquinas, a prominent medieval philosopher and theologian, believed that natural law is rooted in God's eternal and immutable moral principles, which are discoverable through reason and observation of the natural world.

Distributive justice is concerned with the fair and equitable distribution of resources, benefits, and burdens among members of a society, addressing issues such as income inequality, access to healthcare, and educational opportunities.

John Rawls' 'veil of ignorance' is a hypothetical scenario in which individuals make decisions about the principles of justice without knowing their own social, economic, or personal characteristics, thereby ensuring impartiality and fairness.

Retributive justice focuses on punishing criminals as a means of deterring future offenses, upholding the principle that wrongdoing should be met with appropriate consequences.

Thomas Aquinas believed that the primary purpose of government is to promote the common good of all citizens, which includes ensuring justice, peace, and prosperity for the entire community.

Positive law is created and enforced by human authorities, such as governments and legislatures, while natural law is believed to be inherent in the nature of the universe and discoverable through reason and observation of the natural world.

Procedural justice is concerned with the fairness and impartiality of the processes and procedures used to make decisions, rather than the specific outcomes of those decisions.

Aristotle identified three main types of justice: distributive justice, which deals with the fair distribution of resources and benefits; commutative justice, which concerns fair exchanges and transactions between individuals; and retributive justice, which focuses on punishment and the restoration of balance after a wrong has been committed.

Restorative justice emphasizes the importance of repairing the harm caused by crime and promoting reconciliation between offenders and victims, rather than solely focusing on punishment and retribution.

John Locke believed that a just society should be founded on the principles of equality and fraternity, where all individuals possess natural rights to life, liberty, and property, and where government is limited in its powers and subject to the consent of the governed.

Social justice is concerned with addressing systemic inequalities and promoting equality and fairness for all members of society, regardless of their race, gender, class, or other social factors.

Immanuel Kant's categorical imperative is a moral principle that requires individuals to act only according to those maxims that they can consistently will to become universal laws, thereby ensuring that their actions are morally permissible for all rational beings.