I suggest that you practice thinking of yourself as a future member of the posthuman ruling class. In this century, the planet faces the pressures of 9 or 10 billion people trying to raise their standards of living, amid ecological changes like global warming, and at the same time biotechnology, neurotechnology, and artificial intelligence will come tumbling out of Pandora's box. The challenges of the future are about posthuman people living in a postnatural world, and many of the categories which inform current thinking about "efficient charity" and "existential risk" are liable to become obsolete.