"The arrow of time" which you're referring to (entropy increasing in closed systems) is something that is IMO still puzzling in the field of physics. To be clea

"The arrow of time" which you're referring to (entropy increasing in closed systems) is something that is IMO still puzzling in the field of physics. To be clear, entropy isn't a "force" its just a statistical effect (a very large number of particles in a system are always going to be more likely to be in a macrostate that has the most microstates -- meaning that the system will tend towards more "disordered" states). However, it should be noted that the arrow of time only applies to the macroscopic universe. All of the laws of physics (in this article's case it's quantum mechanics) are time symmetric (if you play the experiment in reverse you couldn't tell it was being done in reverse -- which is what you can see in Feynman diagrams). So at the heart of it, the universe is very symmetric in time. To quote Primer: "What's the one variable in all of the equations of heat and matter? What's the one variable that you can turn negative and still get rational answers? Its not energy, it's not mass..." [It's time].