Alienation is the modern problem - lack of meaning, purpose, a sense of being isolated and detached from life, the world, reality...
The lack of success among those who have explained the necessity for a transformation in consciousness has been near total - a few individuals have done it, to a significant extent - but nobody has been able to pass on the secret, nor train others.
Why? What is blocking it?
I think the answer is - no single thing, but many things; such that when we overcome one block, then there is another right behind it.
As children, we are participants in the world around us - but as we grow we are socialised into alienation. This works by means of inculcating a materialist/ positivist/ scientist metaphysical system through-which we perceive the world; a set of basic assumptions which impose and ensure alienation.
When we are children we see the world whole - we understand it as-a-whole, and feel at home in it - but we understand very little specifically.
As we mature, we are fed the world divided into bits and pieces - and we are given an understanding of it in bits and pieces. These divisions are justified by their short-termist, pragmatic value in achieving the socially sanctioned purposes of living. They built the modern world...
But the divisions by which we experience the world are unreal and dead - they are, essentially, false because arbitrary divisions - not organic, not endorsed by our deepest intuitions - they change and transform and they contradict each other.
The world thus broken-up can never be reanimated, and can never be reassembled - we are given the world in dead dots, and the dots cannot be connected - and even if we did (somehow) connect the dots, they would still be dead dots.
So - if we want to participate in the world again - we must go back to the drawing board; must reject virtually all of our specific knowledge about the world divided into bits and pieces - and re-build our specific understanding in a fashion which acknowledges the world as alive conscious and endorsed by our deepest intuitions.
This is a huge task, and the the short to medium term there is an enormous loss of 'materialist' understanding - an understanding that is unreal, unsatisfactory, deathly... but of pragmatic value in keeping things going.
This is a big ask - it is necessary but it will utterly change our lives. That is why there has been so little progress. We are locked-into a false, dead materialistic understanding that alienates us - but to cure the problem requires radical surgery... to cut-out modernity... and the prospect has, so far, been just too intimidating.
So we prefer not to think about it - and live lives of distraction and intoxication, and existential solitude.