Pope Paul VI in Populorum:
"The progressive development of peoples is an object of deep interest and concern to the Church. This is particularly true in the case of those peoples who are trying to escape the ravages of hunger, poverty, endemic disease and ignorance; of those who are seeking a larger share in the benefits of civilization and a more active improvement of their human qualities; of those who are consciously striving for fuller growth."
This was Pope Paul VI's first social encyclical. Drawing on his personal experience visiting developing nations, he called for greater assistance in the development of nations, greater efforts toward peace, and a renewal of genuine human development taking into account the person's material and spiritual needs.