<i>Morals that are not backed by reason are on shaky grounds</i><p>I'd argue that all moral decisions are made on emotional, not rational, grounds. The ones that appear to be reasoned are in fact just rationalizations of emotional decisions.<p>Morality is how emotions manifest themselves in decision-making, and those emotions evolved to maintain specific social behaviours. There's nothing wrong with that. That's how morality (e.g. reciprocity) works in all other animals, and it's why there are so many grey areas and edge cases (white lies being a prime example).