Study philosophy and you will undoubtedly come across Thales of Miletus, who is credited as the first philosopher in Greek tradition. He is famous for suggesting that everything is made of water (a school of thought known as Monism).
Others would come along and suggest the world is made of fire, air, earth or a combination of all four. Keep going through history and you still have that tradition of thinking: atoms, string theory, etc.
While scientists continue to probe further into the smallest pieces that construct our world, I continue to be plagued by another question:
What holds the universe together?
Is it God?
Weak and strong forces?
Love?
These suggestions are just as viable as everything being made of water, even if they don’t completely hold any ground.
After all, it continues a tradition of thinking that there’s something out there that unites us all, instead of breaking us apart.