1) Professor Claude Rochet discussed the common good at a forum in Paris on August 25, 2013. 2) He argued that a legal regime loses legitimacy if it infringes on principles of the common good, and citizens can judge the natural right legitimacy of a regime. 3) Rochet presented the common good as an emergent reality and deliberative process, not a fixed content, involving sharing goods publicly, equal access, and how individual and collective well-being improve together through society guided by common good principles.