My "nihilism" I think the reason why you feel like it doesn't have meaning to believe that our biological "identity" could be a start instead of a state, is because we live in a society of people that are focused on their ego instead of their being human. Being human is thinking being aware of humanity, not just of us and of our offsprings. The attitude of egocentrism has created a system where we feel like we have to have a greater ego than a greater humanity to succeed. We feel like we have to do a lot of things because we have to, but we don't know if we want them and we don't know what we want. There comes a point when you realize that a lot of things we do don't make sense. We do have to accomplish in some way a biological end, survival, but we have o survive being aware of the fact that everything changes, and that we have to adapt in order to continue being human beings and not to turn into something else. I think we should explore ourselves and the way we think and find humanity, an ideal that has the chance to become visible when we realize that what we thought made sense doesn't anymore and we have to look for a "greater" sense.