I don’t think it matters much that there is reason to believe Human Brains Unlikely to Evolve Into a ‘Supermind’ as Price to Pay Would Be Too High. The brains of individuals might not evolve much while still allowing a substantial amount of advancement in the minds which form and also draw upon a human intellectual community. Our communities and the ‘virtual’ minds — in a crude manner of speaking — which are part of those communities are far from their limits and that means our minds can advance much further even if our brains are unlikely to become so many ‘superminds’. I’ve often quoted the historian Carroll Quigley in this sort of context:
The truth unfolds in time through a communal process.
See for example the essay, Knowing Truth in a World Where We Perceive What is Useful for a short discussion revolving around the modern empirical insight that we don’t see colors directly but rather by way of complex brain operations, a form of thought and not a raw ‘seeing’ allows us to perceive that red ball as being the same color in shade or sunlight though it reflects different wavelengths of light in those two circumstances. Similar things happen in more abstract forms of thought such as those very intense forms of abstract thought we call theoretical physics and creative literature. We directly perceive an Aristotelian reality which we shaped into a Newtonian reality over the past few centuries, but those ‘common-sense’ realities mask what we now ‘know’ to be a relativistic and quantum universe though we strongly suspect it to be ‘really’ something that remains as yet unimaginable to our best scientists and philosophers and poets. The very fact that we know this tells us we can overcome many of our biological limitations by proper use of our fleshy brains and also by way of our communal ways of knowing.
It doesn’t matter if the ad-hoc processes of evolution trick us because that really means we’re evolving and — in most parts of our lives — developing at one level and realm of being in which other levels and realms are implicit but invisible. We can discover the ways in which we’re tricked and compensate when it matters.
In Christian terms, the mind of the Body of Christ in this mortal realm might have a lot of growth and development left in it, God willing. Much of that knowledge, truth if you will, found in that communal mind does find its way down to individual minds as we can see by the way that advanced concepts from philosophy and technology and business and politics and various ‘positive’ sciences have made their way into our modern minds as enriched and complexified words and concepts. We individuals can’t know all that the communal mind knows but we can know enough of higher-level encoded knowledge to function as petroleum engineers or particle physicists or historians or lawyers or machinists or truck-drivers in this complex world with thousands of libraries, as well as many websites, each containing more knowledge, and vastly more partially processed information and data, than the fabled libraries of the ancient world.