Well, even ethics is mostly social ethics...and if you look @ Albion's definition of "life purpose" -- 'twas solely an interior purpose...he seemed to basically agree that "external" purposes are beyond his mark.
IoW, in Albion's grand "scheme" of things, "THE life purpose" is basically SELF...full of SELF (something we might otherwise call "SELFishness")...and nothing else.
Wow! What a horrid way to live!
Reality is its not possible to be ethical as ethics are founded in morality.
I don’t know where you got the “and nothing else” from. I simply mean that I need no outside authority or force to give meaning to my life. If I were alone on a desert Island my life would still have meaning. There would still be things for me to achieve and to learn. I would still have a purpose.