Pope Pius XII gave numerous radio messages and interventions between 1939-1954 focusing on justice, peace, and establishing an international order guided by morality and law. While he did not publish any social encyclicals, he showed constant concern for rebuilding the international order shaken by World War II. He emphasized the importance of natural law and called on business and professional classes to work for the common good. Pius XII is seen as the precursor to Vatican II and later papal social teaching due to his sensitivity in understanding the signs of the times.