The first argument that Freud makes in his assault on religion regards civilization. Freud argues that human civilization arose as a result of mankind's needs to protect itself from nature. "It was precisely because of these dangers with which nature threatens us that we came together and created civilization." (Freud 19) As a result of the need for organization and manpower to prepare defenses against nature, the instincts of men had to be controlled. He furthers this argument by saying that two human traits, laziness and the unwilling nature of the masses to listen to reason are responsible for the necessity of the rule of law. Freud then describes the various methods of coercion that can be employed by civilization to halt instinctual privation. The most important of which he points out as being religion.
The main reasons that Freud ranks religion as being/having been the most important tool in civilization are it's ability to explain the various inequities and inexplicable phenomena that afflict human civilization. Freud points out how ancient civilizations used religion to "humanize" nature. By making these natural terrors beings that could be dealt with just like men it allowed people the chance to react to and have the illusion of influence on nature. He also illuminates with slight sarcasm how convenient religion is in it's ability to rectify all the trials and tribulations of life