AEON MAGAZINE (March 22, 2025) by Mariel Goddu:
Causal understanding is the cognitive capacity that enables you to think about how things affect and influence each other. It is your concept of making, doing, generating and producing – of causing – that allows you to grasp how the Moon causes the tides, how a virus makes you sick, why tariffs change international trade, the social consequences of a faux pas, and the way each event in a story leads to what happens next. Causal understanding is the foundation of all thoughts why, how, because, and what if. When you plan for tomorrow, wonder how things could have turned out differently, or imagine something impossible (What would it be like to fly?), your causal understanding is at work.
In daily life, causal understanding imbues your observations of changes in the world with a kind of generativity and necessity. If you hear a sound, you assume something made it. If there’s a dent on the car, you know that something – or someone – must have done it. You know that the downpour will make you wet, so you push the umbrella handle to open it and avoid getting soaked. You watch as an acorn falls from a tree, producing ripples in a puddle.
The human power to view cause-and-effect as part of ‘objective reality’ (a philosophically fraught idea, but for now: the mind-independent world ‘out there’) is so basic, so automatic, that it’s difficult to imagine our experience without it. Just as it’s nearly impossible to see letters and words as mere shapes on a page or a screen (try it!), it is terrifically challenging to observe changes in the world as not involving causation. We do not see: a key disappearing into a keyhole; hands moving; door swinging open. We see someone unlocking the door. We don’t see the puddle, then the puddle with ripples-plus-acorn. We see the acorn making a splash.
Mariel Goddu is a doctoral student in philosophy at Stanford University in California. From 2012-22, she was a practising cognitive scientist, focusing on causal reasoning in early childhood. She earned her first PhD in developmental psychology from the University of California, Berkeley in 2020. Her philosophical work lies at the intersection of philosophy of action, biology, and mind.