Conversation so far:
What is the Principles of justice?
A Theory of Justice is John Rawls's magnum opus
What is the Liberty Principle in John Rawl's Theoty of Justice?
John Rawl's Liberty Principle establishes equal basic liberties for all citizens.
What is another principle in John Rawl's Theory of Justice?
A Theory of Justice also introduced a two-part second principle comprising Fair Equality of Opportunity and the famous difference principle.
Why is John Rawl's difference principle controversial?
The Difference Principle regulates inequalities: it only permits inequalities that work to the advantage of the worst-off. This is often misinterpreted as trickle-down economics.
What is the Fair Equality of Opportunity principle in John Rawls Theory of Justice?
The Fair Equality of Opportunity principle maintains that offices and positions should be open to any individual, regardless of his or her social background, ethnicity or sex.
What is the difference principle in John Rawls Theory of Justice?
The Difference Principle regulates inequalities
Are there more principles of justice according to John Rawls besides the Equality and Liberty principles?
There are only two principles in John Rawls' Theory of Justice.

Question: What else did Rawls do?
Self-contained rewrite: What else did John Rawls do besides the Theory of Justice?