>>45742693"Entropy" is a physical quantity that is oftentimes associated with randomness, decay, and the death of all things. What it is, specifically, is a statement of probability: on average, that which is most likely to occur, will occur. If you consider all the ways a set of objects could be arranged, there are uncountably many more ways for the room to be "disordered" than "ordered" -- namely because we denote only one specific configuration as "order" and all others as "disorder," so naturally the room tends towards disorder as time progresses unless you step in and reverse course. This is entropy.
Entropy factors into concepts like "the heat death of the universe" because temperature is an average quantity. It is the average energy of all the atoms comprising an object. Heat flows from hot to cold, but not the other way around, because there are more ways for heat to be "mixed" and result in two warm objects than if the heat is entirely segregated into one very hot and one very cold object. This is true even at the universal scale. Stars and planets are hot, the interstellar void is not, and over time the temperatures will become uniform everywhere. But the universe is infinitely big, and distributing this energy (on average) uniformly over an infinite area means the energy at any given spot is 0. Meaning everywhere in the universe will have 0 energy and thus be dead. And because the universe comprises everything, by definition, there is no room for a 3rd party to come "tidy up" and fix it like you do with your room.
Entropy is a very confusing subject that basicallt everyone who has ever studied thermodynamics is mystified by, despite every science fiction writer in the world doomposting about it.