The Origin of Causality
Why does causality work? (OR: What is change?) Modern physics offers a powerfully sophisticated description of the behaviour of matter, including extremely complex maths that gives us highly reliable predictive power. But, when you peel back the layers of that onion, what you find are wispy metaphors and “placeholder” terms at the core. The most popular, of course, are the terms “energy” and “force”. But, what is that? The common example of billiard balls provides a good illustration.