It is obvious that humanity faces existential threats of a global nature. They are global in the sense that is not possible to deal with them unless we resort to global governance.

The possibility to go on indefinitely with our lives may become a reality and it will present us with a temptation.

Even where people in different cultures agree they may all have gone wrong.

I look at the most promising putative moral theories. I construct crucial thought experiments in areas where they give conflicting advice. I confront their conflicting advice with my own moral sensitivity, my moral intuition. I take the theory that can best explain the content of my intuitions as gaining inductive support through an inference to the best explanation.

Normative ethics, pursued as a free, systematic, and critical attempt to find moral truth, regardless of religious and other authorities, is a rather new adventure. Let's wait and see what will happen!

I am now a decided non-naturalist realist. And today we may even speak of a trend towards non-naturalist moral realism.

Once we realise that utilitarianism comes with the idea of blameworthy rightdoing (such as when you push a big man onto the tracks in order to save five lives) and blameless wrongdoing (such as when you don't push a big man onto the tracks in order to save five lives), then utilitarianism all of a sudden appears to give the right answers.