Some normative issues are especially prevalent early in life:Why is it not okay to spill food on purpose? Why is it wrong to drag dirty shoes into the living room? Families with young children frequently face these kinds of transgressions, yet we know little about how young children evaluate such transgressions. In addition to studying preschool-age children’s reasoning about these and other normative issues, we are also studying how adults justify their judgments about very difficult moral dilemmas (for instance whether it is permissible to sacrifice one person to safe five).