Social teachings of the papacy
Social teachings of the papacy encompass papal views described in social encyclicals and other papal communications, beginning with Rerum novarum, Pope Leo XIII's encyclical of 1891. == History == === Pre-Vatican II === Pope Leo XIII, amidst the Industrial Revolution and concerns about the deteriorating working and living conditions of urban workers, wrote the first social encyclical of modern times, Rerum novarum ("Of new things"), in 1891.
Source: Wikipedia — Social teachings of the papacy (CC BY-SA 4.0)