This is a post by Josefa (Pepa) Toribio (ICREA, University of Barcelona).

Some actions strike us as right or wrong—as morally charged. For example, imagine you see someone helping an elderly person cross the street. You might immediately feel that this is a good action. Conversely, if you witness someone being rude to a cashier, you might instantly sense that this behaviour is wrong. When we recognize that an action is wrong, what does this recognition involve? How should we understand this sensitivity to basic moral properties?