My website is very imperfect and is a constant 'work in progress' so to speak but thanks for reading it.
I should start by saying that I believe the absolute split of Monism and Dualism is dated, and I'm not at all alone in that. The terms go back to Descartes and there have been hundreds of years of query about consciousness since then, not to mention discoveries by neuroscience. Many different ontological positions have been shoved under these two umbrellas.
The reality is there are an array of different possible ontological positions on consciousness that could have something going for them in one way or another, some of these seem to crossover between or even shed all together the labels of Monism and Dualism.
The work on my website, and also in a paper I have written, primary focuses on the relationship between the mind and the behavior of matter in the brain. Specifically the implications of changes in behavior of brain matter due to the mind.
The primary reason I label myself a dualist is because I believe under the current list of ontological positions on the mind, the position property-dualist interactionism, where the mind and its features (such as Qualia) are causally relevant non-physical properties of the matter in the brain. provides I believe a useful way to model how things like Qualia exist in relation to brain matter, especially from an evolutionary perspective where a lot of my focus is.
I believe that when it comes to describing the ontological relationship between the mind and brain matter, we might always be doomed to finding the best model.
Models can be flawed but still useful, as has been shown in science quite often. I also believe that many implications drawn about consciousness using one model can be useful for people who subscribe to different models so long as some things are held in common.
"but I can't see how a system can emerge and displace the already existing system of self organization" — pop
Its happens one tiny small change at a time, similar to how evolution in general works. It does not simply leap from one system to another. After a large number of small changes, that build onto one another, big changes start to emerge.
Changes in the system of consciousness get carried over to future generations the same way other features of an organism do. If they provide survival benefit, the genes that correlated with them get passed on. If they hinder the organism, the genes get selected against.
Each evolutionary change in the conscious system must add some beneficial change in behavior to the system (in terms of its usefulness to the organisms survival), so it provides evolutionary advantage and the organism who posses it carries on its genes (and so on and so forth).
This is how we developed our conscious systems compared to the more primitive ones of our ancestors 50 million years ago. And you can scale this all the way back to the beginning of organisms.
Pain/Pleasure
Pain and Pleasure are extremely prominent features of the mind, especially as it relates to what is called will. There is certainly an important pain/pleasure gradient evolutionarily, as in how much pain/pleasure an organism were to experience for a certain stimuli will govern how it reacts to that stimuli. So is very relevant in terms of survival.
That being said, I don't believe all of consciousness can be reduced to variations and developments of a system of pain and pleasure.
What's interesting is that it is easy to theoretically develop an organism that has a system built into its brain where it will move away from things which damage it, and move towards things which advantage it (lets say give it energy, such as food.) You do not need phenomenal experiences of pain and pleasure to perform this task at all. For some reason, evolution found it better to do it with phenomenal experiences within humans and other mammals. I have my own theory as to why this is but I have written enough for now.