Evolutionarily I dont think there is a purpose, nor do I think our purpose is to reproduce.
Evolution has no intention or direction, we just happen to reproduce pretty well, so there happens to be a whole lot of us around.
We choose whatever we want to do with our lives & more likely than not, reproduce in the meantime. Sorry, not very poetic I know, but reality is a bitter pill to swallow sometimes..
well islame, even from a scientific perspective, the emergence of human intelligence and technology(esp bio tech) is a development deserving a footing on the same level as biological evolution uptil today on earth.
decisions made inside human craniums will have a major bearing on life on earth in the coming centuries and millenia (if we make it), so i don't think its fair to think of humans collectively as purposeless happenings anymore.
the mind will continue to have increasingly more control over matter