Casualism is the philosophical view that the universe, its creation and development, is solely based on randomness.
[3] Casualism assumes the universe came into existence as a random event, and was not created by any omnipotent entity.
Casualism has certain atheistic traits, but none of the ancient philosophers denied the existence of gods.
[4] Epicurus postulates that the gods simply stay out of the day-to-day running of the universe and are not even aware of the existence of man.
[3][4] The philosophy is based on observations of well-known natural phenomena, such as ocean waves or the random fall of rain drops.