But to create this atmosphere of lasting peace, neither peace treaties, nor the most solemn pacts, nor international meetings or conferences, nor even the noblest and most disinterested efforts of any statesman, will be enough, unless in the first place are recognized the sacred rights of natural and divine law. No leader in public economy, no power of organization will ever be able to bring social conditions to a peaceful solution, unless first in the very field of economics there triumphs moral law based on God and conscience. This is the underlying value of every value in the political life as well as in the economic life of nations; this is the soundest "rate of exchange." If it is kept steady, all the rest will be stable, being guaranteed by the immutable and eternal law of God. (Papal Encyclical, Caritate Christi Compulsi, 3 May 1932).
Human laws in flagrant contradiction with the natural law are vitiated with a taint which no force, no power can mend. To overlook this truth is to forget that the real common good ultimately takes its measure from man's nature, which balances personal rights and social obligations, and from the purpose of society, established for the benefit of human nature. Society, was intended by the Creator for the full development of individual possibilities, and for the social benefits, which by a give and take process, every one can claim for his own sake and that of others. Higher and more general values, which collectivity alone can provide, also derive from the Creator for the good of man, and for the full development, natural and supernatural, and the realization of his perfection. To neglect this order is to shake the pillars on which society rests, and to compromise social tranquillity, security and existence. (Papal Encyclical, Mit Brennender Sorge, 14 March 1937).