Psychology, is the study of behavior and mental processes on why organisms do what they do and how they behave in a distinct manners, For example when we stereotype people, we characterize a series of traits based on history or specific traits that signal their position in a particular group or society; What is the cause to our prejudice mindset?
People categorize information in order to interact and react with things surrounding us, unfortunately, this also leads to prejudice thinking. Humanity needs to be able to place not only people but, ideas, and objects, we do this in order to manage or understanding on humanity based on factors comparable to age, sex, and race. Minimizing a series of differences between people into certain groups.
Additionally another cause of discrimination is through family and how we are raised. Living in a household with minimal open views to another race, a child could grow to have the same thinking process, accepting its permitted to be prejudice.