God chose a very strong, but very peace-loving Cardinal from Perugia, Gioacchino Vincenzo Raffaele Luigi Pecci, to be known for all time as Pope Leo XIII, God's diplomat. 

One of the most powerful encyclicals written by Pope Leo XIII was Rerum Novarum, the Rights and Duties of Capital and Labor.

Pope Leo XIII composed the prayer to St. Michael the Archangel, asking his protection. It goes as follows:  “Saint Michael the Archangel, defend us in the battle; be our defense against the wickedness and snares of the devil. May God rebuke him and do you, O Prince of the Heavenly Host, by the power of God, thrust into hell Satan and the other evil spirits who prowl about the world seeking the ruin of souls. Amen”