I found the Attachment Theory really interesting, as well as the Stages of Separation Distress. It kind of seems like common sense, things that people often feel or experience, just put down into words. I think the Theory is very accurate in describing the human need of maintaining relationships, however I definitely know a couple people who refuse the company of others. At first, I wondered how the Theory would account for these people, but then I realized that many of these individuals do not seem happy or satisfied with themselves/their life. So maybe the theory is right after all.
Related to the Attachment Theory is the 3 Stages of Separation Distress. Talking about it so frankly and indifferently is kind of intimidating! The "stages of your agony after your breakup," or, if you're a child, the horror of your mother making you sleep in your OWN room. According to an online Child Development Guide, neglecting to attend to this Separation distress can lead to a low self-esteem and impaired relations with peers. These stages can be extremely difficult for people to deal with. I think many people fixate on the possibility of experiencing these stages (neuroticism) that they can eventually make the experience real, even though they may not want it to happen.
The overarching theme I found between these two ideas can be summed up with "Don't leave me!" We strive for human companionship and naturally are reluctant to lose it.