I recently got into a discussion on facebook regarding
the safety of GMOs, which quickly (and perhaps somewhat predictably) devolved
into a pointless argument. I was
primarily talking with two musicians, friends of a friend, who insisted that
the overwhelming scientific consensus on GMOs was that they were safe and there
was really no room for conversation on the subject. I was told that the question of GMO safety
boils down to ”whether you accept the validity of scientific
consensus or whether you're plugged into one of the AltMed quasi-cults.” All this from a musician! (I should mention for any who don’t know that
I’m a nutrition student.) I like
musicians, and I like music, but I don’t usually seek out musicians’ professional opinions on
health-related questions.
Arguably one of the biggest take-home messages I’ve received
from studying nutrition so far is that the human body is extremely complicated. Everyone is different and each person is
different depending on time of day, what they just ate, and a hundred other
factors. Anybody who’s ever studied
organic chemistry can attest to how complex the human body and metabolic
pathways are. It’s appealing to think
that when you eat 8oz of broccoli, predictable and consistent effects on the
body will occur for everyone. It’s appealing,
but it’s just not true. The human body
is made up of complex, sophisticated mechanisms that take significant study to
understand. And it’s really a beautiful
thing, because these mechanisms serve to protect the body in a multitude of
circumstances.
This brings me back to the arrogant musicians on facebook. There is a false sense of being objective,
scientific, and knowledgeable that comes from blindly accepting the majority
opinion. One of these guys argued that it
would be illogical for him to stray from the “scientific consensus” opinion that
GMOs are safe because, as he is a layman in this subject, all he can do is
listen to what experts say. Funny that
being a layman doesn’t also preclude him from telling me, someone who is
actually studying the subject, that I’m wrong before even hearing my arguments. Even if GMOs are safe, I still say that his
logic is flawed:
It’s not unscientific to disagree with the majority
opinion if you’ve studied the subject and reached a differing conclusion that
you can back up. In fact, I would argue
that this kind of dissent embodies what science is at its core. However, agreeing with the majority opinion simply
because it is the majority opinion makes one a blind follower with no
understanding of the subject, and vulnerable to becoming a patsy in someone
else’s scam. The musician doesn’t
understand the issue himself but is content to parrot what he has read, and does
not hesitate to tell anyone who disagrees that they’re wrong, even if they might
be more knowledgeable than he is.
I agree that it is at least somewhat logical for a layman
to subscribe to the majority opinion. I
understand this reasoning. But what is
not logical is to fiercely argue a point of view on an issue that one really doesn’t
understand. This is not scientific; this
is dangerous and ignorant. One good and
recent example of the dangers of widely accepted misinformation in the arena of
health is the recent debunking of the myth that saturated fat causes heart
disease. The recent well-publicized cover
of Time about the merits of dietary fat is a testament to this struggle. Mainstream science and medicine has only
recently come around on this myth, just ahead of Time magazine. Until very recently, the idea that saturated
fat causes heart disease was completely embraced by the medical community for
60 years – but why?
One guy, Ancel Keys, came up with a theory which he first
presented in the 1950s that sought to establish a causal link between saturated
fat and heart disease. He cherry–picked data
to support his theory and pushed it hard, hard enough that it came to be regarded
as scientific fact, despite the significant flaws in his data. The musicians from facebook would have been
satisfied – “scientific consensus” had been reached, but that didn’t make Keys’
theory true. However, that didn’t stop his
theory from being quickly embraced with very little scrutiny, and the medically
accepted recommendation for heart health given to nearly everyone for decades
became to replace healthy saturated fats with vegetable oils and margarine.
It has only been in the last few years that this has
begun to change, even though the “AltMed quasi-cults” had been trying to warn
us. It
turns out that saturated fat is much healthier for most people than the
vegetable oils that margarine is made from.
In fact, heart disease has skyrocketed since the switch to margarine and
vegetable oils, and we now understand that widespread consumption of low
quality vegetable oils is largely responsible for the modern epidemic of heart
disease we currently face.
We must live with the fact that we let one man so
drastically influence medical consensus without properly reviewing his flimsy
data. We must also live with the fact
that it took 60 years and the prodding of the AltMed quasi-cults to get the medical
community to wake up and notice, to put it bluntly, that anybody had done any
research since Keys. In the case of
saturated fat, scientific consensus let ignorance reign and people died because
of it. We would be wise to learn from
this mistake and do our best not to repeat it.
I personally don’t have much reverence for scientific
consensus. Some people get really turned
on by it, but I don’t understand the appeal.
If everybody agrees about something it means we’re on the cusp of a new
understanding of that subject, not that we’ve finally got it figured out! When has that ever happened? Never!
No, instead it means it’s time to question everything and to be ready to
make that next quantum leap to the next level of understanding, even if doing so
illuminates how wrong we’ve been about some things. I firmly believe that almost every scientific
consensus that has ever existed will eventually be proven wrong, and that revering
them serves only to slow progress.
Getting back to Keys and his hijacking of the scientific
consensus, it’s absolutely amazing and terrifying that one person was able to singlehandedly
derail medicine’s understanding of heart disease and saturated fat for 60 years. It gives me goose bumps, and I think it’s
worth reflecting on the weight of this for a few moments. It’s not difficult to see the dangers of blindly
following the consensus on anything, especially an area as important, complex, and
as quickly evolving as health and medicine.
Neither is it hard to see the parallels between the
saturated fat debate and the current debate about GMOs. At their core, both are about the food industry
which is, in turn, about money. The
margarine industry years ago needed a scientific consensus to declare margarine
“the heart-healthy alternative to saturated fat” in order to convince consumers
to buy its margarine, and capitalized on Keys’ flawed research to market their
products. And Keys, of course, was happy
to receive free publicity for his theory.
Fast-forward back to current day and the story is much
the same, but with different players:
Companies like Monsanto want to patent and sell their GMO products and
make money. Making money is what businesses
do, after all, and I don’t think it’s a bad thing. But we need to make sure that we’re not
repeating the mistake of blindly following what we’re told is scientific
consensus, as we did with saturated fat.
We need to make sure that private interests are not rushing the availability
and sale of dangerous products that have not been adequately tested for safety.
Maybe GMOs are safe.
That’s really not what this about.
I have gone out of my way to make this not be about that.
This is about the perils of blindly following popular
opinion, the so-called scientific consensus, a practice and mindset that are
decidedly unscientific. It’s about being
aware that for many of the people involved, this is just a business decision,
and that “scientific consensus” is a commodity to be purchased. It’s about being aware that real science questions
everything all the time, and that constant, meticulous and unrelenting self-scrutiny
is what makes science such an incredibly powerful tool that is worthy of our
respect. But judging the merits of a
scientific theory based on its popularity is just that – a popularity contest,
and something that bears little resemblance to science as I understand it.