ok, so smoking weed has made me think clearly and i have had this theory, not a theory really, more of a realization.
I like to compare humans as ants, there are billions of us, and we all do things that we think serve a purpose. We made our civilization the way we did, and it continutes to run this way developing more advanced things. BUT, we are just animals living on this planet, i believe that evolution exists/always had existed. We are just the most concious and able to think outside of just survival instincts unlike other animals.
like i said, kind of just a realization, but individually, we dont really make a difference or serve a purpose. We are just worker ants, with a VERY FEW of us making advancements in society, but really our society is just what we make it.
EDIT: back on topic, the meaning of life is nothing. we are just organisms that have developed highly and are able to think outside our inherent instincts.