What is the purpose of a flower? What is the purpose of a rainbow? What is the purpose of a grasshopper? What is more interesting is the societal anxiety that produces the question. People say that this economic recession/depression we're in is the worst since 1932.
We're facing environmental dangers. We're facing dangers from "low-level conflicts" all over the world. We're facing dangers from right-wing reactionary politics. We're facing dangers of the response to world "islamic terrorism." And there are so many others.
What I'm saying is this: It is tempting to try to find the "ultimate purpose," in such an environment, such that if "humanity" could only be pointed toward it, we get off this seeming self-destruct cycle we're in. One wonders 'What the hell are we doing......?