rosequartz I do not think the end of the world is imminent. I think that most people don't think the end of the world is imminent. That sort of thing, not mainstream religious belief, is what I meant by a patently absurd belief.
As far as gold standard vs cutting edge is concerned, perhaps you would like to define the two. I would suggest that 'gold standard' has a solid evidence-base behind it, whereas cutting edge has some evidence, but not enough to make it 'gold standard'.
It follows that it is logical to try gold standard first, if there is more evidence to support its use. As soon as cutting edge has enough evidence to confirm its efficacy is equal to gold standard, it becomes gold standard and stops being cutting edge. Or, alternatively, the evidence shows that after all it is not as effective as the current gold standard, and it falls from use.
jen I meant that in the 18th century, leeches were in common use for numerous medical conditions, even though they were of no proven value. Now their use is largely discontinued, but as Galen has pointed out, there remain a few indications.
In the same way, as you say, Women's Rights was considered a completely barmy concept in the 18th century. Nowadays, in this country at any rate, far fewer people take that view.
My point was that it takes decades, or centuries, for opinion to change from unacceptable to acceptable and vice versa.