I kinda think of ‘free energy’ and ‘entropy’ as being things that living creatures in some sense ‘consume’. We use the ‘order’ present in the universe to advance our goals (e.g. homeostasis) and leave behind a trail of higher entropy. We harness a gradient of incoming energy and order.
The sunlight which a plant absorbs might counterfactually have been turned into heat after being absorbed by the ground, and ended up in the same entropy state (from the perspective of the universe). Or it might have reflected, traveled light-years through space, and warmed some other thing. The leaf managed to insert itself in this process, intercepting the free energy, and more rapidly-than-counterfactually-expected increased the entropy of the universe.
And living multi-cellular beings are basically made up of tiny entities, cells, which are generally doing the metabolism process internally. And then mitochondria and chloroplasts within cells. But it would be a mistake to say that the living thing is causing itself to be disordered because it’s increasing entropy in parts of itself. It’s spending free energy (and ‘excreting’ entropy) in order to accomplish things. For instance, using a muscle (converting some of its stored energy to motion and waste heat) in order to bring food to the creature’s mouth. The creature is creating an anti-entropic state, pursuing its specific goals, by increasing the probability of the universe corresponding to its goal state, by causing other things to be extra entropic (always with some extra loss along the way, like from friction). You are missing the order that the agent is creating in the world though if you aren’t analyzing the world with the frame of how likely the agent’s goals were to be achieved by random chance (e.g. Brownian motion) versus by active optimization efforts by the agent. Anytime a living creature agentically does anything, they are consuming free energy and excreting entropy.
That’s my understanding anyway, but I may be using the physics terms wrong since I’m not a physicist.
I kinda think of ‘free energy’ and ‘entropy’ as being things that living creatures in some sense ‘consume’. We use the ‘order’ present in the universe to advance our goals (e.g. homeostasis) and leave behind a trail of higher entropy. We harness a gradient of incoming energy and order.
The sunlight which a plant absorbs might counterfactually have been turned into heat after being absorbed by the ground, and ended up in the same entropy state (from the perspective of the universe). Or it might have reflected, traveled light-years through space, and warmed some other thing. The leaf managed to insert itself in this process, intercepting the free energy, and more rapidly-than-counterfactually-expected increased the entropy of the universe.
And living multi-cellular beings are basically made up of tiny entities, cells, which are generally doing the metabolism process internally. And then mitochondria and chloroplasts within cells. But it would be a mistake to say that the living thing is causing itself to be disordered because it’s increasing entropy in parts of itself. It’s spending free energy (and ‘excreting’ entropy) in order to accomplish things. For instance, using a muscle (converting some of its stored energy to motion and waste heat) in order to bring food to the creature’s mouth. The creature is creating an anti-entropic state, pursuing its specific goals, by increasing the probability of the universe corresponding to its goal state, by causing other things to be extra entropic (always with some extra loss along the way, like from friction). You are missing the order that the agent is creating in the world though if you aren’t analyzing the world with the frame of how likely the agent’s goals were to be achieved by random chance (e.g. Brownian motion) versus by active optimization efforts by the agent. Anytime a living creature agentically does anything, they are consuming free energy and excreting entropy.
That’s my understanding anyway, but I may be using the physics terms wrong since I’m not a physicist.