This is a good article. It’s well researched and well organized. But I don’t think that the relationship attachment styles are as sharply defined as you indicated. I have aspects of secure and anxious and avoidant in myself. And you did not address the possibility that two people’s personal growth would pull them apart from each other. The unspoken assumption in your essay is that people should remain together, assuming they are both mentally healthy individuals. For couples who have children, I can understand why that’s the default. But should it be the default for a couples without children? Isn’t it possible that two healthy people could grow apart in a way that they would be happier individuals if they were no longer married?