Why do People Disagree? The author of this blog explains the causes of disagreement through psychological studies. He says that people disagree due to different desires, mentalities, and backgrounds. People who were raised differently might have conflicting morals with another individual who was brought up in a different setting with different guidelines to live by, therefore affecting their assumptions leading to difference in opinion, or a disagreement. People who care more about a certain issue may value their issue over another individual's issue; for example, let's say that Brayden thinks that pens are the best writing utensils while I argue that pencils are better. If Brayden's personal belief that pens are better than pencils is one that he feels very strongly about, it is going to be difficult to get him to side with me and say that pencils are better. It is all about being open to new suggestions in order to either learn new facts about certain issues, or agree to disagree respectively.