Pope Leo XIII issues the encyclical Rerum novarum

Background. The encyclical responded to social conflicts provoked by capitalism and industrialization, which had fueled socialist and communist movements. Leo XIII articulated the Church's response to these emerging economic theories, aiming to calm class conflict. The document applied traditional teachings on property and employer-employee relations to modern conditions, hence its title 'Rerum novarum' (new things).

Core Arguments. Rerum novarum supports the rights of labor to form trade unions and earn a living wage, balanced with the right to private property. It rejects the extremes of state socialism and laissez-faire capitalism. The Pope declared that the state's role is to promote justice through the protection of rights, while the Church must teach social principles to ensure class harmony.

Nuanced Critique of Socialism. While earlier encyclicals strongly condemned socialism, Rerum novarum offers a more nuanced critique. It lists positive and negative aspects of socialism, though ultimately viewing certain expressions as fundamentally flawed. The text emphasizes that the free operation of market forces must be tempered by moral considerations, restating the importance of private property rights.