Glad you like it! The family tree graph idea is interesting, but one problem I see with this is that it would quickly branch out so much that it may be unreadable. Do you have a specific use case in mind?
The problem is that the more successful the system becomes (i.e. it's used for more valuable use cases) the more incentive there is to attack it. There needs to be a dynamic analogous to Bitcoin where the resources that go into securing the network grow along with the value of the network.
This paper is really about solving a fundamental problem in decentralized identity, which is to combine the characteristics of self-sovereignty, privacy and Sbil-resistance, which seems to exclude each other.
I previously proposed formalizing this problem as Decentralized Identity Trilemma (http://maciek.blog/dit).
I'm not sure if using the word "narcissism" is helpful in this context. We are all self-absorbed to some extent and it's good to maintain a practice that keeps this at bay.
I found these two things particularly helpful:
1) Developing a practice of meditation
This helps to notice the self-absorbed thoughts and recognize them for what they are. I'd recommend in particular attending a silent retreat in Vipassana tradition https://www.dhamma.org/
These retreats are organized all over the world and are donation-based, so you can afford them regardless of your financial means. It only takes time and dedication.
2) Developing interest in other people
I was surprised that this can be learned, but it certainly can. I've often heard things like "assume everybody knows something you don't know" or "everybody can teach you something". I've found this advice to not be particularly helpful. It didn't offer a process for developing this interest.
My personal experience with this practice:
a) I notice what I appreciate and find interesting about the person I am speaking to more frequently and sooner into the conversation.
b) I notice afterwards that I derived far more satisfaction from conversations in which I was interested in the other person rather than when others were interested in me. However, during the conversation I still crave attention. I am starting to notice these cravings as they happen. It's a little like eating a healthy meal vs. eating a cookie.