If all cosmos were the same distance apart, gravity would pull them all in the same direction. They’d remain perfectly aligned, and precisely nothing would happen. Irregularity, imperfection, and lack of order in hydrogen compacts, atoms of gas gravitating away from each other, and compressed temperatures is what created our universe. Perfection in our galaxy simply does not exist. Without imperfection, neither you nor I would exist.
― Stephen Hawking [Artwork by Fran R. Learte]