Introduction: “You have to believe in free will. You have no choice”. Seriously, if our Universe is a clockwork Universe, where causality rules absolutely (as both Newton
I will argue that if causality means anything, then everything is predetermined and therefore there is no free will. Causality rules – a cause causes an effect which in turn becomes the cause for a later effect which is hence the cause for an even later effect, and so on down the line. It’s an unbroken causality chain starting from an initial set of fixed conditions. The past determines the present which determines the future. If you knew the past to an absolute infinite amount of detail, then you know the future to that same degree of infinite detail, and free will doesn’t enter into things.
Our Universe could be a reflection, albeit on a far grander scale, of those computer-generated simulations, like “Life”. Start with a simple set of initial conditions and relationships, add several rules to the mix, press ‘enter’ or ‘go’ and see what happens. Such simulations can evolve into immense complexity, but the outcome – as far up the track as you wish to extrapolate – is 100% predetermined.
You can download and run “Life” on your home computer – in fact I understand some come automatically equipped with the software. In a similar way, cosmologists run simulations where they vary the various parameters thought to have existed close on the heels of the Big Bang event or era, along with the laws and constants of physics and see if the simulation evolves into something approaching the large scale structure of our actual, observed, Universe. Their fundamental assumption is of course that causality is absolute. If you start with ABC, you end up with XYZ – the first time, the last time, and all the in-between times.
If causality however is a sometime thing (like a woman is – sorry, I didn’t write the song, Gershwin did, so complain to him when you get to the afterlife part of your existence), then there must be (or probably is) such a thing as free will.
Now quantum physics as we currently understand it, is in-deterministic – it’s all based around probabilities, not certainties. Einstein never accepted that, believing to his dying day that there was some undiscovered deterministic or certainty principle or hidden factors that would restore or reaffirm causality in the realm of the quantum. If Einstein were alive today, he’s still be waiting. However, the indeterminacy and lack of causality in the realm of the quantum has nothing to do with free will.
Free will, if it exists, is a function of the mind; it’s all in the mind – the ways and means of consciousness to achieve a conscious choice. Free will, if it exists, is ultimately then a function of brain biochemistry or neurochemistry. Chemistry is deterministic and causality driven. Chemistry is an atomic process, but chemistry is still macro compared with the micro of the quantum realm. If you combine sodium and chlorine in equal parts and only probably get table salt and thus every now and again you get quartz or stainless steel instead, well that’s just not the way the Universe works. That’s not the way chemistry, any chemistry including brain biochemistry or neurochemistry works.
Let’s explore the issue further.
Firstly, free will means making decisions that have no predetermined outcome. Free will is coming to that metaphorical fork in the road and having the ways and means or ability to choose one path or the other. Even choosing neither, doing nothing, is in itself a decision.
Decisions require conscious thought – well, maybe not. There’s something more fundamental at work here – physics and chemistry.
Let’s start with simple life forms, say microbes and plants.
Plants and microbes make decisions but clearly they do not have free will. They respond to external influences. Plant roots ‘decide’ to grow downwards with gravity; the plant ‘decides’ to grow upwards, against gravity. Phytoplankton ‘decide’ to move up and down in the ocean with respect to light intensity, and plants can ‘follow’ the Sun as it moves across the sky. Unicellular organisms ‘decide’ to reproduce when the environmental conditions are right.
Even more complex organisms that we don’t normal associate with free will make decisions. A snail will decide to tuck into its shell with threatened. We may call it instinct, but its still decision making, albeit somewhat involuntary.
At what point does instinct or blind response to environmental stimuli morph into the appearance (real or illusionary) of free will?
And so we have, slightly higher up the evolutionary chain, a threatened organism will decide to fight or flee or hide or go into its shell. The response is not 100% instinctive; not apparently 100% predetermined. The organism chooses, and if it is not instinctive, then the decision required thought.
Decision making, instinctive or otherwise, has an awful lot to do with chemistry, and ultimately physics, because organisms are chemical structures, and chemistry is ultimately based on physics.
So, thought processes are ultimately chemical processes, ultimately routed in physics – we’re back to that micro world again!
Faced with a non-instinctive decision – fight or flee; red dress or green dress; scrambled eggs or boiled eggs – you have to think about it. That thought process sets into motion a chain of chemical and physical processes. It’s like you’ve pulled the handle on a slot machine - when everything stops and the numbers (or symbols) come up, that’s it bingo – decision made. But you had no actual control between setting the wheels in motion and the result. Your decision making was only an illusion of free will.
I repeat - once those chemical and physical processes are set into motion, you have no control over them – no say-so. You have no say-so in the reactions that happen, in the energies required to see those processes through to completion, what pathways electrons travel over your neural circuits.
Should that be surprising? Setting your brain aside for a moment, the rest of your body does not answer to what you want. In the exact same way you have no control over the natural chemical reactions that take place in your stomach when you dump a load of food into it, or for that matter any of the biochemistry that makes you tick. You don’t dictate to your body what pathways electrical impulses take when they blink your eyelids or control your heartbeat or make you twitch or even when you put one foot in front of the other.
Every molecule, atom and fundamental particle in your body does not answer to what you want, free will or no free will. You do not decide what they do! If you really had free will – willpower or mind-over-matter – you should be able to decide to control your aging process, or control your hair growth or colour. You can’t. You don’t really have free will.
You can only hold your breath for so long, or deprive yourself of sleep. While a relatively few can have the willpower to starve themselves to death when food is readily available, few could willingly die of thirst, and astronomer Tycho Brahe* notwithstanding, you can only put off going to the bathroom just so long and no longer. On a less gruesome note, how long can you prevent your eyelids from blinking?
If you have no control over the operations of your own body – its systems, organs, tissues, cells and biochemistry, why is the brain – including the mind, or that inner ‘You’ within you any different?
To be continued…
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