what is the best theory that that attains to achieve social justice between utilitarian theory and justice as fairness

The best theory that aims to achieve social justice between utilitarian theory and justice as fairness is a combination of both.

Utilitarian theory focuses on maximizing overall happiness and well-being for the greatest number of people, while justice as fairness focuses on ensuring equal rights and opportunities for all individuals. By combining these two theories, we can create a system that promotes both the greatest overall happiness as well as equality and fairness for all members of society.

This hybrid approach ensures that decisions are made with the goal of maximizing overall well-being, while also taking into consideration the needs and rights of marginalized or disadvantaged individuals. This way, social justice can be achieved by balancing the competing interests of multiple stakeholders in society.