Michael Voris has put together a rather interesting video on Freemasonry. It's long, but certainly worth watching...
It gives us an insight into the group that is ultimately responsible for the worldwide apostasy we are currently enduring. At the beginning of the 20th century, the forces of Satan truly began to besiege the Church as the Heavenly Jerusalem, when the forces of Freemasonry began to acheive its long-term goal of the secularisation of society.
"And when the thousand years are ended, Satan will be released from his prison and will come out to deceive the nations that are at the four corners of the earth, Gog and Magog, to gather them for battle; their number is like the sand of the sea. And they marched up over the broad plain of the earth and surrounded the camp of the saints and the beloved city...2
"Leo XIII truly saw, in a vision, demonic spirits who were congregating on the Eternal City (Rome). The prayer that he asked all the Church to recite was the fruit of that experience. He would recite that prayer with strong, powerful voice: we heard it many a time in the Vatican Basilica."
(Cardinal Giovanni Nasalli Rocca di Corneliano Ephemerides Liturgicae V. LXIX)
"This twofold kingdom St. Augustine keenly discerned and described after the manner of two cities, contrary in their laws because striving for contrary objects; and with a subtle brevity he expressed the efficient cause of each in these words: "Two loves formed two cities: the love of self, reaching even to contempt of God, an earthly city; and the love of God, reaching to contempt of self, a heavenly one."(1) At every period of time each has been in conflict with the other, with a variety and multiplicity of weapons and of warfare, although not always with equal ardour and assault. At this period, however, the partisans of evil seems to be combining together, and to be struggling with united vehemence, led on or assisted by that strongly organized and widespread association called the Freemasons. No longer making any secret of their purposes, they are now boldly rising up against God Himself. They are planning the destruction of holy Church publicly and openly, and this with the set purpose of utterly despoiling the nations of Christendom, if it were possible, of the blessings obtained for us through Jesus Christ our Saviour."
(Pope Leo XIII, Humanum Genus, 1884)