In the classical/Newtonian physics the mechanical evolution (motion) of an object is completely defined by its initial conditions (location and velocity). If we know the initial conditions and the laws (!) governing the motion we can predict the exact location of any object at any time. That is not a case in the quantum world. Even if we knew (which is physically impossible) the initial conditions of a particle/object/system we still could not predict its exact future state. “Social particles”, a.k.a. humans mostly behave like classical objects, i.e. their initial conditions (parents, time and place of birth, traditions of the culture) almost completely define their future life. However, in principle, when an individual learns the laws governing the behavior of each and everyone (a.k.a. a society), that individual has an opportunity to alter his/her own path from the pre-defined one (whether he/she wants to use this opportunity is entirely up to him/her).
A physical object cannot self-act, self-propel, self-move, there is no self-action in a physical world. But humans have the ability to act on themselves - at least in principle. That makes humans the one and only anti-entropy force in the whole universe, a.k.a. the force of a progress (in the contradiction to the force of a decay/distraction governing the physical world).
There are many differences between the classical and the quantum worlds. When a classical particle encounters a barrier, it must bounce back off it, it can only be reflected by the barrier, it simply cannot pass through it. But when a quantum particle encounters a barrier there is a chance (an actual mathematical probability) to find that particle outside of the barrier. This phenomenon has a name “tunneling’.
When I teach PY106, I always use this fact for an analogy between the physical world and a social world. I always tell my students, when you hit a wall, when you encounter a barrier (your parents, a friend, your boss, your teacher) ask yourself one question: “What kind of a particle I am? Am I a classical particle that can only bounced back off a barrier? Or, am I a quantum particle which can tunnel through?”