It is important that we understand that there is a real world, and that we live in it. The mantra of “real for me” and “true for me” is a distortion that makes a real difference in how we live, the choices we make, and the kind of community we seek.
One of the implications of the the success of the scientific world view is the vindication of the existence of the real world. I can run a test for iron in your blood, confident that your body works essentially like mine, and that the test for iron will work the same on your blood as it does for mine, no matter where you live or what you believe about bodies, science or blood.
But to say we all live in the same, real world is not the same thing as saying that we all experience or think about the world in the same way. We perceive the world through a subset of all possible perceptions, all possible senses. For example, we have no ability to see into the infrared, so we don’t visually observe the heat of an object. What we sense about the world is a subset of what is “out there” to be observed. So one person can see a rock and not know it is hot,while another person can see and feel it, and so knows that it is hot. Because we don’t all observe all of the world’s properties, our starting points can and do differ.
Next we process and filter what we sense. For example, we have 3 color receptors (some birds have 4), so we “sort” light waves into 3 bins – a somewhat arbitrary choice that limits what we report to our brains. We have blind spots, chemical fatigue, we have special receptors to process lines, etc. What we pass on to the brain has been filtered and enhanced before it ever leaves the eye.
Then we process and filter our perceptions in various places in our brain – for example, converting a chemical signal from the eye into the experience of color, looking for faces, identifying patterns, processing motion – we do quite a bit of pre-processing before our awareness of the outside world gets to our consciousness. For example, out brain suppresses background noise, especially when we concentrate, so we may not “hear” someone talking to us, though there is nothing wrong with our hearing – it has literally been blocked by our brain. Sometimes, our perceptions get passed onto different parts of the brain on “priority override” and we find ourselves on our feet and running before we are consciously aware of some perceived threat.
Finally we make decisions about the meaning and significance of what we see – ignoring some data, rationalizing others, assuming other things not in evidence. Some of this is under our control, lots of this is not – and our responses can be predicted by our genetic makeup, physiological state, upbringing, education, faith and culture.
What we pay attention to, how we assign significance, what responses we can conceive of in responding to what we perceive – these are all in large part not going to change from experience to experience. It may be that you can “expand your consciousness” to encompass possible ways of thinking about and responding to the world around us – but this is a difficult, unpredictable and time-consuming process. Even conversion experiences and “ah-ah” moments are the culmination of complex cascades of thought and experience.
In the past, challenging someone to a fight over a slight of honor would have been commonplace. Today, it is less accepted, at least in some circles. Once, changing your path to not cross that of a black cat’s would have been deemed prudent. Today, I hope, not so much. Once, you would have taken on your father’s job, or been married, or taken a religious vocation. Now, there are lots more options. Once, the world was full of dangerous capricious spirits – in the trees, in the water, behind the wind, in the creatures we encountered – a magical, potent nature to be approached with awe and fear, and propitiated. It is not quite so numinous these days, at least for most people. Are we exercising our free will when we walk, unafraid, across a stream that our ancestors knew housed a capricious water sprite, or do we just see the world differently?
A more recent example are the reactions to the 2000 Florida presidential vote. Researchers found that they could predict an individual’s attitude to the crisis by looking at a person’s education and background, even though the judges, lawyers, business people and so on interviewed thought they were judging the evidence. It is a sobering reminder that what we feel so strongly to be a rational decision may be more about who we are and how we were educated and raised, than about the facts themselves.
What we think of as free will is much more determined by the culture in which we live (and that does include concepts like materialism, and faith, and the nature of “reality”) than by any absolute intellectual categories. Even so, materialism does not posit that because we are “just” biological machines, we are limited to mechanical responses to inexorable forces. Rather, it suggests that the world we see around us is governed by knowable principles. Even if things are too chaotic to predict, the possible consequences can be modeled, and predictions can be made and assigned various probabilities.
This is why you or I can go to a store and buy jeans that reflect our individual style, even though they were made months ago in the tens of thousands by strangers on the other side of the world! But still, within certain guidelines, we do choose this brand and not that, this style and not that one. And we can, within limits, decide to look at the evidence and begin to change how we view and react to the world.
So angels do not push the planets in their orbits – you need to look to physics to understand the motion of celestial objects. People not not fear loud music because their mother was scared by a cannon shot while they were in the womb. We look to the physiology we inherited, and our own experiences. The witch in the next village is not making your cow sick because she put a curse on you. We turn to veterinary medicine and epidemiology, and forgo burning the witch.
The choices we make are bounded by how we sense, how we filter, the things we have inherited from our culture that tell us how to make sense of our world. And within the degrees of freedom provided by our physical and psychological faculties, and within the range of things that we can imagine, given the times we live in, we make choices. Not completely free, but not completely bound, either.