i feel like there are two sides to your question. one is the literal one, which is what is the chain of events that led to human beings appearing on the earth. the other is, since we are self-aware to a higher extent than other living beings, are we supposed to use that for a specific purpose other than survival. this "supposed" word implies design, and even if we were designed, we were designed in a way that can't be discovered by using the tools that we have been provided with. it's a riddle with no answer. you can choose what you want to do with this self-awareness and ability to have thoughts. i have chosen to follow my curiosity.
