Lleó XIII

Lleó XIII, born Vincenzo Pecci, was pope from 1878 to 1903 and is remembered for his progressive views on social issues and his efforts to address the needs of the working class. His encyclical 'Rerum Novarum' laid the foundation for modern Catholic social teaching, advocating for the rights of workers and the importance of social justice. He played a pivotal role in strengthening the Catholic Church's relations with the United States and was known for his intellectual approach to theology and philosophy.