Lovecraft's Layers of Fear

While I'm aware of how foolish it is to categorize anything in Lovecraft's universe, there's this drive in me to contain the insanity or understand what can't be understood. In my research of the many stories I've come across three major fears that plague the characters in his universe. 

1. The origin of mankind. While it is only hinted at, mankind may only be a science experiement created by the Elder Things. For what reason and what purpose is unknown and humanity is left to wander Earth much like the Shoggoths. Purposeless and devoid of meaning. This flies in the face of both Evolution and Biblical accounts of mankind's creation. Most of Lovecraft's smaller monsters and aliens fall into this category.

2. The importance of man. We're raised to believe that mankind has a purpose on the earth. Lovecraft says that we are but a blip in the universe. The reveal of monsters such as Cthulhu or the other dieties shows Lovecraft's protagonists that they are pointless. This is the principal theme of Lovecraft's work, this idea that we are minor actors in the grand scheme. The gods care for us as much as we care for the ants we step on. To further this idea, the gods' thoughts are beyond our small morality system. The way they think and act are impossible for us to grasp that the mere attempt or introduction to them drives us insane. We cannot comprehend the incoprehensible. 

3. We are all a dream. This only applies to Azathoth, the god of the gods. In Lovecraft's lore we are faced with the possibility that we are only the dream of a god. Dreams play an important role in Lovecraft's work. Most stories use dreams as premonitons but with Lovecraft, dreams are a gateway to another realm. As Azathoth sleeps, we live, but should he be awoken, all of reality, from humanity to the gods, will vanish.