I think the human race sleeps at night because they're in denial. They prefer to be active during the "day" when blinded by the local star Illuminating the planets face. They choose Earth as their reality. They choose to believe that they exist on Earth. This falsehood is the ego of man they forget they share a planet with countless species whom outnumber them and that they do not exist on a planet they exist in a cosmos. At night I can see reason to be frightened to understand the scale of the universe and how small you are and how short your lifespan actually is the vertigo can be daunting. But to be different from the other species to climb out of the jungle to civilize to become the peaceful people capable of making World Peace that reality is just a dream I had during the "day".