This is a long read, but totally worth it. It's about Elon Musk's new company Neuralink and why we need it. The latter is answered quite thoroughly. http://waitbutwhy.com/2017/04/neuralink.html What amazed me was the perspective of humans as a whole, seen as a single organism, where a single human is a neuron. Separate neurons don't mean anything, it's the collective neurons that count. tl;dr: We need to merge with computers to not become obsolete by AI.