When businesses and market economies function properly and focus on serving the common good, they contribute greatly to the material and even the spiritual well-being of society. Recent experience, however, has also demonstrated the harm caused by the failings of businesses and markets. The transformative developments of our era—globalisation, communications technologies, and financialisation — produce problems alongside their benefits: inequality, economic dislocation, information overload, financial instability and many other pressures leading away from serving the common good. Business leaders who are guided by ethical social principles, lived through virtues and illuminated.