M01 — Why efficient cause fails for action
Time: ~45–60 min · Depends on: none · Unlocks: M02
The idea in one minute
If the only real causes are impacts — A hits B, B moves — then intentional action becomes a mystery. Wanting coffee doesn’t “bump” your arm into motion like a cue ball. Juarrero’s first book argues that action theory inherited a broken causal picture from modern physics-as-philosophy, and that is why it keeps hitting the same walls.
Why this matters (before jargon)
You raise your hand to vote. Friends describe what you meant. Engineers can describe muscle firings. Neither story alone is the full explanation of your action. Something is missing if we only allow collision-style causes.
Core teaching
1. What “efficient cause” means here
An efficient cause is the “push” picture: forceful, energetic, typically external impact. Cue stick → ball → ball. Modern thought often treated this as the only legitimate kind of cause.
2. What went wrong for action
When that monopoly is imported into theories of mind and action:
- Intentions look like tiny inner pellets that must “fire” the body
- Mental-to-physical causation threatens to double-count or break “physics is closed”
- Intentions can’t persist as ongoing guidance if causes are spent on contact
- Top-down influence (the whole guiding the parts) becomes almost unintelligible
Analytic action theory then recycles paradoxes: deviant causal chains, wayward causes, mental causation puzzles — symptoms of a thin causal vocabulary.
3. The everyday gap
Think of:
- Holding a note while singing (ongoing regulation, not one impact)
- Catching a glass as it slips (context-sensitive correction mid-motion)
- Keeping a promise over months (meaning guiding many micro-behaviors)
Billiard-ball stories under-describe these. They miss sustained, meaningful, context-sensitive organization of behavior.
4. What DiA is trying to do
Dynamics in Action (1999) has two big claims (in spirit):
- Action theory rests on a mistake when it inherits efficient-cause-only physics as its model of how intentions relate to behavior.
- Complex dynamical systems theory can supply a better framework for how meaningful intention informs behavior without reducing meaning to a discrete push.
You don’t need the full book yet. You need the problem felt.
Must-get summary
- Efficient cause = push / impact model of causation
- Alone, it cannot adequately explain intentional action
- The pain shows up as paradoxes about mental causes, persistence, and top-down guidance
- Juarrero’s project starts by rejecting the monopoly of that causal picture
Key terms
Claims this module locks in
Check questions
Answer in ../07-working-notes/_answer-prompts.md:
- Give an everyday action that pure “impact causes” under-explain.
- What would a purely mechanical story leave out?
- In one sentence, what problem is DiA solving?
If you’re stuck
Re-read only the “everyday gap” section. Invent your example before any jargon.
Go deeper (optional)
- REPORT §§1.2, 2.1, 2.5
- Talks: Modes of Explanation pt1
JecQPzNRzGQ - Book: DiA Part I (later)