Esoteric knowledge.
It is those thinking patterns and information sources that usually make those in charge very nervous. This particular branch of learning not only causes, it encourages one to think for one's self. It takes away the power of the classic sciences. It questions the basis of most religious teachings, especially those that teach one must have a guide or leader into the House of the One.
It puts us as a species back in touch with the side that has never been anything less than connected to the planet of our physical origin. The spirit may not belong here, being that it is not physically manifest, but the body and the life it must lead for the short period it walks here is bound to this little piece of solar dust. Without it, we cannot exist. The foolishness of trying to send ourselves out into the depths of space to start new colonies cannot be iterated enough. We are Terrans. This is where we belong, not the face of the dead moon or nearly dead Mars. No other planet known to us at the moment is able to support us without aid from this one. The idea of off-world self-sufficiency is still the stuff of science fiction.
I digress.
Perhaps the species needs to arrive at a point where it can accept OBEs as a way to explore off world. I dare say that is several generations in the future, but one can hope. I must confess,on a personal level, that everytime I watch the news and see what humans can do themselves and the only home we have without a second's thought, I do wonder if we will or should survive.
Then I listen to some of the music that means so much to me, or gaze upon the greatest artwork we have produced, and I weep inside that this all may fall too, if we don't grow up. What will they find when we have done our worst and pass into the dust of time? Will we look like the barbarians we are much of the time, or might by chance some of the beauty humans can produce survive to sing our passing?
All this learning, all this seeking, might in the end, mean absolutely squat. The only thing it may be good for is getting the general populace to think for itself. If enough open their eyes and tell the others "in charge" to shut up and sit down, maybe our species will have a chance.
The ball is in your court people. Don't miss.