Because atoms are made of of mostly empty space, and everything is made up of atoms...?

An atom is made of Protons, Neutrons, and Electrons. According to String Theory, each of these subatomic particles are made of vibrating strings of energy. The speed at which the string of energy vibrates will determine what it is.

The proton is made of two up quarks and one down quark. A neutron is made of one up quark and two down quarks. And an electron is made of a different quark.

The string of energy that is an "up quark" vibrates at one frequency. The string of energy that is a "down quark" vibrates at another frequency. And the string of energy that is an electron vibrates at another frequency.

I think God may have done it this way because it does what he wants it to do. It works. Atoms may be made of mostly empty space, but you'd never know it.

Iron is solid. Water is wet. Air is breathable.

Things have color. And so on. If atoms were solid, nuclear fusion may not work.

Who knows. In other universes in this or other dimensions, there may be atoms that are completely solid. Of course, these other universes may be completely different from our universe.

And they may not be able to support complex life (like us).

The atom is not the fundamental building block of all stuff. They stopped thinking that around 2000 B.C. Or the Civil War. Anyway, deep below the atom is something called "Electrons, protons, and neutrons."

It is the way that electrons revolve around the nucleus that determines atomic weight, mass, and all that. And going one level further down from atoms is something called "The quark." The quark is the thing that protons, neutrons, and electrons are all made up of.

But "The quark" is not the most fundamental building block of all stuff, either. The quark is a type of tiny bit of matter called the fermion, and quarks exist in structures called hardrons. The most fundamental building block of matter is the "Boson."

Or, if you're totally lost as this point, you can go with "Fermion and boson" if you like, as except for a handful of physicists specializing in quantum mechanics, no one else has any idea what I just said anyway. So, anyway, the atom is neither all that small nor all that empty.

I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.