“Where’s the evidence – David”

IMG_20191129_105716I should dedicate this posting to Sid Harris, my sociology tutor at tech college, a thousand years ago, who would challenge my sociological flights of fancy with the words – “- that’s all very exciting David, but where’s the evidence?” If there is any way of sending a profound thank-you to the past it would be to Sid for providing me with the alethiometer (great TV adaptation isn’t it?) that all thoroughgoing sceptics need to get through the mire of speculation, quackery and sheer roguery that infests our culture.

But the question has its price – particularly that going after the evidence demands a lot of commitment, blind alleys and reading which, added up, mean you have to live until you’re at least 110 to understand a simple question like ‘why does peeling onions make your eyes water?’ My latest read – yes I get through 3 or 4 books a week – is “Garlic and other Alliums” by Eric Block, and which is a magnificent book that makes me want to cheer and applaud every other paragraph. But understanding the central chapters depends on a familiarity with organic chemistry which I don’t have.  Every opening door leads to another whole corridor.

But today I’ll start with a Guardian article that perfectly demonstrates the thought I’m working on. If you haven’t clicked on the link, the article concerns biochar – a form of charcoal made by burning wood in an atmosphere starved of oxygen – so far so ordinary charcoal – but by doing it in a retort that captures all, or most of the nasties that would otherwise be released into the atmosphere. The hypothesis is that by making huge quantities of this compound and digging it into the earth we would be sequestering carbon in a way similar to, let’s suppose peat bogs or coal reserves. The article goes on to suggest that the biochar might also improve soil fertility and even the health of grazing animals at the same time. It’s a no-brainer, we should all go out and buy it right now save the world in a day. Except for a paragraph towards the end-

While academics and researchers are optimistic about the benefits of biochar, they are not blind to the risks either. “If we’re wrong, and we spread hundreds of thousands of tonnes of charcoal over the UK, we can’t get it back out of the ground. We’ve got to be right. The stakes are really high,” says Udall.

The evidence isn’t there yet.  It might be there in a year or two, if we do the research, but like most breathlessly announced breakthroughs, we need to slow down a bit. I imagine that the article itself will be mentioned many times, used as a sales pitch and generally enter the consciousness of allotmenteers and gardeners all over the world without the small-print warning following it.

When I started to read about the deep ecology movement I was puzzled by the phrase ‘aquarian conspiracy’ which often cropped up.  For me the ‘age of aquarius’ was a song in a musical where some people got their kit off on stage, I couldn’t associate it with the idea of a conspiracy. But what the phrase seems to allude to is the concept of a ‘new age’ in which all of the great challenges facing us are ‘solved’ by the application of new technology.  Apparently this became something of a Silicon Valley mantra. While you might think that making charcoal in a fancy retort is hardly ‘technology” it’s clear that the ideological use that it might be put to  could be a dangerous diversion from the pressing issue of our anthropocentric environmental greed. Soaking up excess carbon is a must, but you need to stop producing it at the same time.  The pressing danger of the ‘aquarian conspiracy’ is that it allows us to carry on polluting in the false belief that there’s always a technology around the corner.  And there’s no evidence for that either!

Evidence based science often clashes with the sales pitch – it’s hardly surprising – and the danger is that we rely so much on the carefully crafted ‘evidence’ produced for us like pre-digested seagull food, because we lack the skills to find out for ourselves. Here’s an interesting quotation from David Hoffmann’s book “Medical Herbalism”

I was asked to present a paper on the topic of “Herbal Alternatives to Prozac”.  This quest to identify a herbal alternative to Prozac is a perfect example of how the real gifts of herbalism can be deflected by underlying assumptions. It would, in fact, be more appropriate to consider the holistic alternatives to the current vogue for psychopharmaceutical solutions.

When judging outcomes in phytotherapy, the quality of an outcome depends on your values. If an RHS judge with a passion for formal gardens was asked to comment on our allotment they might say it’s a mess because it doesn’t meet their criteria (tidiness, straight lines, complete absence of pests and diseases), for “a good allotment”. A good outcome in holistic therapy (or gardening) might be an enhanced sense of wellbeing whereas a medical assessment might depend on a series of abstract measurements. Neither method is more correct than the other, they both try to be rigorous and they each have strengths that we depend upon – and in any case I have to say that being loved cared for and listened to is the best healer and that defies almost all science.

I remember well a ward sister at the General Hospital in Bristol where I was a part time chaplain. When she died in a riding accident, they put a plaque on the wall to commemorate her.  It’s gone now and they’ve turned the hospital into expensive flats – and I’ll  make no further comment on that subject! However Sister Valerie Helps – this is my little personal commemoration – had a gift beyond any scientific exploration.  Post operative patients in severe pain would feel better when she came on to the ward.  She would say -“could you hold on for just another half hour?” when they were calling for morphine, and they discovered that they could. She would challenge the doctors when they were attempting to do something stupid and inspire complete confidence in patients and relatives alike.

Lets do the science – masses of it – and be prepared to learn from it, even if it means changing some of our assumptions.  But for science and healing to work together they each need to broaden their underlying assumptions.  For science there’s the need to try to describe and quantify a broader range of outcomes which will have to include wellbeing and other ‘subjective’ states.  For herbalism, gardening and the whackier reaches of human culture we need to accept that not every hand-me-down remedy is necessarily, a priori, better.  I remember my mother talking about the lives saved when sulfonamides were first used during the 2nd world war.  They’ve been superseded now, for the most part, but in their day they were lifesavers. To go back to biochar, it may be a part of the answer to the climate catastrophe but in ethics they always say “you can’t make an ought into an is” and that’s not just a lesson for ethicists but for all of us.

Author: Dave Pole

I've spent my life doing a lot of things, all of them interesting and many of them great fun. When most people see my CV they probably think I'm making things up because it includes being a rather bad welder and engineering dogsbody, a potter, a groundsman and bus driver. I taught in a prison and in one of those ghastly old mental institutions as an art therapist and I spent ten years as a community artist. I was one of the founding members of Spike Island, which began life as Artspace Bristol. ! wrote a column for Bristol Evening Post (I got sacked three times, in which I take some pride) and I worked in local and network radio and then finally became an Anglican parish priest for 25 years, retiring at 68 when I realised that the institutional church and me were on different paths. What interests me? It would be easier to list what doesn't, but I love cooking and baking with our home grown ingredients. I'm fascinated by botany and wildlife in general, and botanical illustration. We have a camper van that takes us to the wild places, we love walking, especially in the hills, and we take too many photographs. But what really animates me is the question "what does it mean to be human?". I've spent my life exploring it in every possible way and the answer is ..... well, today it's sitting in the van in the rain and looking across Ramsey Sound towards Ramsey Island. But it might as easily be digging potatoes or making pickle, singing or finding an orchid or just sitting. But it sure as hell doesn't mean getting a promotion, beasting your co-workers or being obsequious to power, which ensured that my rise to greatness in the Church of England flatlined 30 years ago after about 2 days. But I'm still here and still searching for that elusive sweet spot, and I don't have to please anyone any more. Over the last 50 or so years we've had a succession of gardens, some more like wildernesses when we were both working full-time, but now we're back in the game with our two allotments in Bath.

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