Philosophy
The Metaphysics of Events and the Individuation of Actions
Quick fact
In philosophy, there is no single agreed-upon answer to how many actions occur when you flip a switch. Some say you performed one action (flicking the switch), others say you performed at least three (moving your finger, flicking the switch, and turning on the light).
Why this is interesting
You flip a switch, and the light comes on. Did you perform one action or several? That simple question has puzzled philosophers for centuries.
Read the full explanation
Understanding The Metaphysics of Events and the Individuation of Actions
Think of an event as something that happens at a particular time and place—a change in the world. Actions are a special kind of event: they are things agents do, like raising your arm or baking a cake. Now, the big question: how do we count actions? When you raise your arm to signal a friend, are you performing one action (raising your arm) or two (raising your arm and signaling)? Philosophers call this the 'individuation problem'. There are two main camps. The 'coarse-grained' view, championed by Donald Davidson, says that all the different descriptions (raising arm, signaling) refer to one single event. Just like the same sneeze can be described as a loud noise or an allergic reaction, one action can be described in many ways. The 'fine-grained' view, associated with philosophers like Anscombe (though she had nuances), holds that each distinct description corresponds to a distinct action—raising your arm and signaling are two different actions because they have different properties and intentions. Why does this matter? Because how we count actions affects how we assign moral responsibility. If you signal a friend to start a race, but inadvertently start a stampede, are you responsible for both? Coarse-grained thinkers say you performed one action with two descriptions, so you are responsible for both under different aspects. Fine-grained thinkers say you performed two actions, so you might be responsible for the one you intended but not the other.
A deeper explanation
At the core, the debate is about identity conditions: what makes an event the same event across different descriptions or contexts? Davidson's coarse-grained view relies on the idea that events are concrete particulars, and two descriptions pick out the same event if they are caused by the same underlying occurrence (he used the notion of 'same cause and same effect' to identify events). This aligns with his causal theory of action: an action is a bodily movement caused by the right kind of mental states (beliefs and desires). The movement can be described as a physical event, an intentional action, or a socially significant act, but it remains one event. The fine-grained view, often associated with thinkers like Alvin Goldman, argues that actions are not just physical movements but are constituted by the intentions and results. Thus, raising your arm and signaling involve different intentions and different effects, so they are distinct actions. This view aligns with a more fine-grained individuation of events based on their properties—two events are distinct if they have different properties. The conflict reflects deeper commitments about the nature of events and causation. Davidson's view simplifies causal relata (events are the same causal nexus) but struggles with intentional distinctions. The fine-grained view respects our intuitive distinction between intentional and unintentional aspects but risks multiplying actions without bound (the 'problem of action proliferation'). This debate is not just academic: it affects how we understand what we are morally responsible for, how we explain behavior, and even how legal systems assign liability. The individuation of actions also connects to the debate on free will, because if actions are individuated by intentions, then alternatives and control are tied to intention, whereas coarse-grained views allow more external descriptions to enter moral evaluation.