Garrette,
For psi to be “closed down†it would have to be there to begin with.
So unless you’re positing that psi was present with the first organism then it had to evolve which means it had an evolutionary advantage.
Yes either to some degree, if consciousness is outside the brain, PSI could be from consciousness to consciousness, not so much the brain evolving telepathy, perhaps more like leakage rather than controlled solely by physical evolution
Also an evolutionary advantage can become an evolutionary disadvantage depending on the environment. If the hypothesis the brain is closing down psi in more individualized creatures is true, I suggest this would probably predict less competitive more cooperative creatures have more psi ability ….. to test this might involve testing social insects or perhaps psi trials on tribal communities, if less competitive groups exist. This reminds me of Rupert Sheldrake who also thinks friends and close family do a bit better in telepathy trials, of course to a skeptic this increases suspicion of cheating.
I think competitiveness (which increases individuality and intelligence too) might spoil psi. For example would a rival creature want to psi another creature to know where food is? It is possibly more likely to be used to deceptively entice the rival there to make a meal of it?

I’m just questioning how effective psi could evolve in our physical competitive environment.
Also if PSI can be evolved I would suggest anti-psi would evolve too. (This might also question the wisdom of Mr Randi testing people claiming psi with an adversarial tone, as his 1 million challenge website acknowledges an adversarial tone is very likely to be adopted, it is a challenge that I would sum up as
‘we don’t believe you, we will show you and others, you cannot do what you think you can do’
1. This assumes there is a purpose. There is no indication that there is one. Evolution certainly does not work toward a purpose at all, regardless if an external one exists.
But Garrette, old pal, I put ‘purpose’ in brackets with a question mark, that is only one option, the birth of individual consciousness doesn’t necessarily have to be of great planned purpose ….. just like the physical eye could be said to have a 'purpose' and it does after it exists, the process leading to the purpose was not necessarily preplanned according to materialists ……
..... Similar could apply to evolution of consciousness, a purpose is seen but the evolution of consciousness is really the evolution of consciousness evolving towards the more pleasant and learning to avoid the unpleasant. To the religious this would appear a plan of good winning over evil - they see a purpose and there is one after it exists and imagine an old guy with a white beard is controlling the universe arbitrarily.
But how do you know
‘Evolution certainly does not work toward a purpose at all’ … why does evolution exist at all? …….we need to remember ‘evolutionary advantage’ is a theory, a good one but is it partial or complete explanation of evolution? The idea of a soul evolving , long predates Darwinian physical evolution (I think co-discoverer, co publisher Alfred Wallace Russell later argued the case for soul evolution and psi)
Being a fair chap, Garrette, we can test this, I will award you $1million in 50,000 years time if consciousness is purely in the physical brain (inflation, indexed linked of course

)
2. If there is a purpose about which we are to speculate, then why stop at this one.
No problem, feel free to carry on …
How would a “greater collective consciousness†be improved through acquisition of an individual consciousness?
For example the internet is the linking of individual information systems, the whole benefits.
4. You are, again, assuming that the greater collective consciousness existed prior to the first organism or sprang into being with the first organism.
Not really, I would suggest consciousness could be evolving, collectively and individually, in much the same chaotic manner as physical evolution or by trial and error, acquiring an awareness of what brings pleasant outcomes and avoids pain.
‘if we all had perfect PSI telepathy with no established sense of individuality, how individual would be our minds? Not at all, in my opinion. So perhaps once we have established an identity that evolves through a sense of space and time that occurs as a result of being trapped in the limitations of the body/brain, a sense/experience of individuality is born.
To what purpose?
If you are happy with the idea physical evolution doesn’t require preplanned purpose, why must evolution of consciousness require a preplanned purpose?

I don’t know, I wish I did.
you’re saying something that was better voluntarily morphed at least partially into something more limited so that the something more limited can try to get back as part of the something better.
Not quite, the evolution of individual consciouness, within groups consciousness, within larger group consciousness .. perhaps eventually rooting to a single consciousness (God?) …. The subdivisions are evolving the groups and the whole, is God evolving? Eastern religions might say God is beyond time, therefore already perfect, but expressed in time and space imperfect and evolving.
You’re saying the greater collective consciousness has no sense of separate physical objects. That its very collectiveness is a limitation.
No, I didn’t mean that. I was trying to say to develop a new individual consciousness might occur from a separation/isolation from the source consciousness being shut off from it when in earthly incarnation. Otherwise it would remember it’s origin, previous existence.
I think individual consciousness might split.
Let us imagine the death of a guy called Garrette . Garrette floats out of the body, and whooshes though a tunnel of light ….. he remains Garrette in a place that resembles his expectations, his consciousness is Garratte, he feels he is Garrette, he is indeed still Garrette …… however he begins to realize he existed before being Garrette, and has some memories of making plastic knobs for TV sets in Hong Kong ….. he then meets Miss Wong Tu Shing who also has identical memories of making the very same plastic knobs and buttons for TV sets in the same place at the same time ….. they were the same person, had the same consciousness
but no longer are, Miss Wong Tu Shing did not exactly reincarnate, she continued to evolve where she was and remains Miss Wong Tu Shing ….. her consciousness split for some reason. In nature there is a splitting of cells and even humans into offsping, etc.)
Now Garrette, this might be complete nonsense but you gotta admit I have budding future in science fiction if nothing else (or perhaps an off shoot of my consciouness will have

)
Our individual consciousness could have come from what is now a group consciousness, that came from a collective human consciousness, that eventually links back to one single consciousness - God
This makes no sense whatsoever.
You don’t believe you are part of Miss Wong Tu Shing!

I was merely suggesting consciousness might split and evolve, it is not a loss of consciousness at the split, it is just consciousness heads of two different evolutions sharing the same memory origin .... perhaps all human consciousness is another group all linked at a source level which in turn evolved from another consciousness and so on …….
Then I don’t need the GCC. I can act extremely individually now.
Tough luck Garrette, I’ve decided in this post you have a greater collective consciousness whether you like it or not!!!!!!!!!!
you believe this to be the case, I suggest your efforts to convince others PSI exists are detrimental to the stated purpose. You should convince everyone it doesn’t exist and that any attempts to prove it or develop it are fruitless. Otherwise we’ll never continue our evolution toward a greater individual consciousness.
Hmm … I wonder if Miss Wong Tu Shing was also such cunning debater
Religions have long believed PSI communication could have its spammers, undesired, incoherent information leading to some cases of schizophrenia?
What religions?
Perhaps my wording didn’t make this clear enough. As you will know religions have regarded people hearing voices in the past as possession, performing exorcism etc. Today we call this mental illness …
Further, you are suggesting multiple somethings. A GCC, parasitic entities, spirit people, psi virus.
What do you have besides wild conjecture to lend credence to this hypothesis?
These are also old ideas Garrette, I was suggesting ideas as to why PSI ability might not evolve as expected by some skeptics, in doing so I also attempted to unify common paranormal claims .….. not because I am stating these definitely exist but to show we cannot rule these out, at least yet.
….. a few psychiatrists are re-investigating possession as cause of mental illness, such as Dr Alan Sanderson (
http://www.spiritrelease.com/review_spiritrelease.htm ) claiming cases where it works when medical treatment has failed.
Now whether this is placebo or not I don't know, in my opinion, they really need to do proper clinical trials, which might cause outrage to those hold a-priori belief it is ancient superstitious nonsense .... but I think science should not feel above testing any idea, old or new ......