Utilitarianism, as proposed by Jeremy Bentham and John Stuart Mill, focuses on maximizing the overall happiness or utility of all individuals in society.

Libertarianism emphasizes the protection of individual liberty and minimal government intervention in economic and social matters.

Rawlsian justice, proposed by John Rawls, focuses on ensuring equal opportunity and fairness for all individuals in society, regardless of their social or economic circumstances.

Rawlsian justice incorporates the concept of a 'veil of ignorance,' where individuals design a just society without knowing their own position or circumstances, leading to the principle of compensating for disadvantages.

Critics argue that utilitarianism can lead to the violation of individual rights and freedoms in the pursuit of maximizing overall happiness.

Libertarians believe that individual rights are inherent and derived from natural law, rather than being granted by the government or society.

The difference principle permits inequalities as long as they improve the situation of the least advantaged members of society.

Marxian justice, based on the ideas of Karl Marx, emphasizes the importance of social cooperation, class struggle, and the abolition of private property.

Critics argue that libertarianism's emphasis on individual liberty can lead to a lack of concern for the welfare of the poor and vulnerable members of society.

The original position is a thought experiment where individuals, behind a 'veil of ignorance,' design a just society without knowing their own position or circumstances.

Utilitarianism, particularly in its modern forms, often incorporates economic efficiency and Pareto optimality as important considerations in maximizing overall happiness.

Critics argue that Rawlsian justice is too idealistic and impractical to implement in real-world societies, given the complexities and conflicts of interests that exist.

Libertarians believe that the government's primary role in economic matters is to protect individual liberty and property rights, rather than actively intervening in the economy.

Marxian justice, rooted in the ideas of Karl Marx, emphasizes the importance of social justice, class struggle, and the elimination of class divisions.

Critics argue that Marxian justice is too focused on class conflict and the abolition of private property, potentially leading to a lack of individual freedom and economic incentives.