The title of this book suggests some of the historical significance of Pope Pius IX who occupied the papacy in the middle of the 19th century. We think of the pope as occupying the tiny space of the Vatican City in Rome and being cautious about involvement in the political affairs of the world, but a century and a half ago, the papacy was still a medieval one with huge investments in land and possessions. It didn't divest itself of these and become modern without a ferocious fight, and Kertzer's book details that battle.
Initially, Pius IX had been a popular figure, an unassuming Italian who was elected pope in 1846 by the college of cardinals. He was the last of the pope-kings, a line that had ruled over the papal states, a large swath of land that covered central Italy. This was a period, though, of revolutions that swept through Europe, and the papacy was caught up this fervor. Kertzer makes clear that the pope was a man with good instincts and a deep faith but unable to grasp the significance of the forces that were reshaping Europe. . Margaret Fuller, an American living in Rome had sympathy for the Pope who could not possibly meet all of the expectations of the people. They were forces that were initially set in motion by the American Revolution and the French Revolution a half century earlier and demanded greater rights for individual citizens and a diminishment of the absolute power of kings and rulers.
Italy was a country of abject poverty, even though it was full of sumptuous palaces and churches. Rome, for example, a city of less than 200,000 had over 400 churches, most of them richly decorated. It was an oddly Catholic country in which people believed in church doctrines reflected through religious imagery and practices, but also one in which these same people resented and even despised priests who served as ruling government functionaries and often owned their own land.
Revolutionary leaders began to demand papal state reforms from the pope such as release of political prisoners, replacement of clerical functionaries by laymen, freedom of the press, the release of Jews from ghettos, and disbanding of papal militias. At first Pius was inclined to yield to some of these demands, and released a few prisoners, but he was surrounded by conservative advisors who reminded him that "the laws of the papal reign were given, not by men, but by God." If he began to yield too much power where would it all end?
Events moved fast and ended with rioting and the death of one of Pius' advisors who was shot to death as he stood in a palace window. The Pope feared for his life and had to sneak out of the Vatican palace and take up residence in Naples.
From here, the story becomes political. The pope managed to get the French government to send an army to recapture Rome, now a republic controlled by civilians such as Ciceriacchio, much praised by Florence Nightingale, and helped by Garibaldi,. The French army succeeded, but only after unexpectedly strong resistance.
Once there, though, the French insisted that the Pope, on his return to Rome, make more reforms, something he kept putting off, heavily influenced by his extremely conservative advisor, Cardinal Antonelli. Interestingly, an French politician involved in administering the occupation of the city was Alexis de Tocquville, who earlier had visited and written extensively about American society. The pope was initially reluctant to return to Rome as he felt it was full of enemies. Complicating matters were the Austrian, working behind the scenes to control Rome.
All of this helps explain Piux IX's actions during the 1st Vatican Council, convened in 1869 when Pius was now an old man in his late 70's (his reign of 31 years is the longest in church history) a reactionary council which condemned the rise of liberalism and materialism and is best known for its pronouncement of papal infallibility. Pius had personally felt the results, disastrous to his idea of religious order, of liberal reform movements, and this was, I'd say, his revenge, locking the Church into a conservative and defensive mode for 100 years until the convening of the 2nd Vatican Council which would move the Church in a different direction.