 Thus, in 1931, the Pope Pius XI stated the expression for the first time in the Catholic Social Teaching in the encyclical Quadragesimo Anno.Then again in Divini Redepmtoris, the Church pointed out that the realisation of social justice relied on the promotion of the dignity of human person.The same year, and because of the documented influence of Divini Redemptoris in its drafters, the Constitution of Ireland was the first one to establish the term as a principle of the economy in the State, and then other countries around the world did the same throughout the 20th century, even in Socialist regimes such as the Cuban Constitution in 1976.