Rerum Novarum
http://www.papalencyclicals.net/Leo13/l13rerum.htmEncyclical on capital and labor, promulgated 15 May, 1891. The birth of modern Catholic social teaching, as the pope wrestles with the alienating effects of the Industrial Revolution. 82K.
Submitted in section: Christianity: Denominations: Catholicism: Popes: L: Leo XIII: Works: Rerum Novarum