Epicurus ( Greek: Ἐπίκουρος, 341–270 BC)
was an ancient Greek philosopher who founded a school of philosophy now called Epicureanism.
For Epicurus, the purpose of philosophy was to attain the happy, tranquil life, characterized by ataraxia—peace and freedom from fear—and aponia—the absence of pain—and by living a self-sufficient life surrounded by friends. He taught that the root of all human neurosis was death denial, and the tendency for human beings to assume that death will be horrific and painful, which he claimed causes unnecessary anxiety, selfish self-protective behaviors, and hypocrisy. According to Epicurus, death is the end of both the body and the soul and therefore should not be feared. He also taught that the gods neither reward nor punish humans; that the universe is infinite and eternal; and that occurrences in the natural world are ultimately the result of atoms moving and interacting in empty space