Ask Lemmy

I can get into more detail, but the line of thinking is not only compatible with neuroscience, it is as far as I am concerned a necessary conclusion from everything we know about neurobiology (and biology in general). I am a theoretical biologist myself and can get into detail, but Stanford neuroscientist Robert Sapolsky has written extensively on the subject, and the conclusions of that school of thought are fully compatible with the conclusions of philosophers of consciousness and the self such as Thomas Metzinger.

So no, I do not think that “the person wanted and intended to do that” is a statement that is compatible with what we know about how brains work. But let’s take a closer look at that. Let’s say you have a person who had his daughter kidnapped, and the kidnappers told him that they would execute his daughter unless he robbed a bank for them. The person believes them. He knows robbing the bank is wrong, he put a plan together to do so anyway, and he carried it out. He gets caught, and the kidnappers get caught as well. Assume for the sake of argument that these are undisputed facts. Would that person be guilty of armed robbery? Or would the prosecutor not even bother to bring charges, because the person was compelled to do so via what we’d call a forced move in chess? That’s just a philosophical illustration and still builds on the idea of choice, but it illustrates that even what we consider “choice” isn’t always a free choice and that the justice system accounts for that.

Let me illustrate what I’m actually talking about though. I’m going to make up some values to show what I mean. These are not the actual values, but the relationship holds. Let’s say that for any randomly chosen American, there’s a 1% chance that they will commit a murder in their lifetime. Now let’s start tweaking some of the dials. Our random person, P, grew up in a community where they experienced strong degrees of racism and violence. This physically alters brain structures like increasing the size and influence of the amygdala, which has influenced over fear and threat reactions. It reduces the size and influence of the prefrontal cortex, which is charged with deliberation and predicting consequences. As a result, person P now belongs to a population where they have a 5% probability of committing a murder, because their brain is going to be far more sensitive to threat perception and having a response less regulated by their PFC. Let’s throw in malnutrition, which also affects both brain development and (if the mother was also having such problems) epigenetic developmental factors, which again make changes to both the physical brain and to the genetic processing at the cellular level. Throw in drug addiction. A highly population disproportionate of people in jail for committing violent crimes also have a medical history of traumatic brain injury.

None of those factors were even theoretically able to be affected by the choices made by P, but they heavily biased the probability function. The relationships between all of these factors and a given action are highly characterized. We can look at causal factors from seconds before the physical event (pulling the trigger happened) seconds ago - there were a chain of neural activations in which a specific area of P’s brain caused the muscle contraction in the finger. We can look at what happened hours to days ago that biased those neurons to be triggerable by that level of stimulus. P did not make a conscious decision to have the threat-response associated neurons building to a state of high excitability - that came from the way the brain was wired up in the first place, which happened months to years ago.

What it boils down to is that there is no neuronal argument for free will that can identify a specific chain of causality that identifies and isolates free will as a phenomenon.

Far from being lazy, my position is based on a career in the study and teaching of biology and complex systems analysis, and I can come up with a lengthy bibliography including experimental and philosophical research to defend my position.

The takeaway is that we need to address these as issues that have causal explanations, rather than failures of individual morality. This has been a process that we’ve been performing throughout history, as concepts like demonic possession and trafficking with the devil turned out to be caused by psychological and neurobiological conditions, such as epilepsy. Eventually, should we make it long enough, I think that’s where we will end up.