The difficulty of course is who adjudicates whether something is a true statement or whether it is a dangerous myth.
Would we now call Enoch Powell's speech which caused him to be labelled racist in his own time a dangerous myth or a wise prediction? It has been partially justified.
Conversely, would we call the Labour position on Colonial disengagement a dangerous myth? It demonstrably led to Mugabe et al.
My broad brush would say that politicians, the media, business, the fanatics in any form and the judiciary cannot be trusted to decide the truth because they all have an interest in the outcome. This leaves the wise man and the common man. The wise man will be castrated by the members of the previous list because he might gain a following. The common man, if he has any interest at all, will sit and rail at their performance.
In the end truth will actually win but only when the conclusion is inevitable and perhaps too late to change.
Julian Assange:
Yet it is WikiLeaks, as the co-ordinator of these other groups, that has copped the most vicious attacks and accusations from the US government and its acolytes. I have been accused of treason, even though I am an Australian, not a US, citizen. There have been dozens of serious calls in the US for me to be "taken out" by US special forces. Sarah Palin says I should be "hunted down like Osama bin Laden", a Republican bill sits before the US Senate seeking to have me declared a "transnational threat" and disposed of accordingly. An adviser to the Canadian Prime Minister's office has called on national television for me to be assassinated. An American blogger has called for my 20-year-old son, here in Australia, to be kidnapped and harmed for no other reason than to get at me.
Jonathan Swift
“Falsehood flies, and truth comes limping after it, so that when men come to be undeceived, it is too late; the jest is over, and the tale hath had its effect: like a man, who hath thought of a good repartee when the discourse is changed, or the company parted; or like a physician, who hath found out an infallible medicine, after the patient is dead.”
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the dreamers of the day are dangerous men, for they may act on their dreams with open eyes, to make them possible.