I don't deserve to be arrogant here, not having done anything yet. The goal: I had a sister once, and will do what I can to end death. The road: I'm working as an engineer (and, on reflection, failing to optimize) instead of working on existential risk-reduction. My vision is to build realistic (non-nanotech) self-replicating robots to brute-force the problem of inadequate science funding. I know enough mechanical engineering but am a few years away from knowing enough computer science to do this.