We can be certain that, if there are conflicting views in different cultures, some of these views must be false. This may help us to transcend our own narrow cultural horizon.

It is hard to tell if capital punishment has such an effect. And even if, in some contexts it has (such as in the American South with a very high incidence of murder), this effect may very well go away if a decent welfare state was replaced for the existing social order.

I am indeed a moral realist.

There are some particular moral truths that I believe we have access to (such as the one not to inflict pain on a sentient being for no reason).

One way of submitting your moral intuitions in relation to some issue to cognitive therapy is to learn more about how people in other cultures think about it.

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

It is of note that for a long time moral nihilism was a kind of unquestioned default position in analytic moral philosophy.