Schizoids are not given enough attention. The world of psychology can educate us a little bit on the 'how' and the 'why' of schizoid disorder. The problem is that each schizoid can be different from other people who are schizoids. While there is a loose definition for the different types of schizoids, everyone's personality is different and has different inborn traits. Our experiences and our brain wiring both help to develop who we are in reference to others and to the world around us.
There are many people with schizoid personality disorder who are roaming planet Earth. They don't feel quite connected to the other people who are around them. They are quite content to live their lives without much interaction with other human beings. Who are these eccentric individuals? Why do they enjoy being alone when others enjoy having a companion? Why do they reject or ignore the affections of other people who might be drawn to their mysterious personality?