Reflective equilibrium is a state of balance or coherence among a set of beliefs arrived at by a process of deliberative mutual adjustment among general principles and particular judgements. Although he did not use the term, philosopher Nelson Goodman introduced the method of reflective equilibrium as an approach to justifying the principles of inductive logic (this is now known as Goodman's method). The term reflective equilibrium was coined by John Rawls and popularized in his A Theory of Justice as a method for arriving at the content of the principles of justice.