"Humanum genus" leads with the presentation of the Augustinian dichotomy of the two cities, the City of Man and the City of God. The human race is presented as "separated into two diverse and opposite parts, of which the one steadfastly contends for truth and virtue, the other of those things which are contrary to virtue and to truth. The one is the kingdom of God on earth, namely, the true Church of Jesus Christ... The other is the kingdom of Satan," which was "led on or assisted" by Freemasonry: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. Lamenting these evils, We are constrained by the charity which urges Our heart to cry out often to God: "For lo, Thy enemies have made a noise; and they that hate Thee have lifted up the head. They have taken a malicious counsel against Thy people, and they have consulted against Thy saints. They have said, 'come, and let us destroy them, so that they be not a nation.'