The concept of relativism, sometimes referred to as postmodernism, is very popular at present: values are uncertain, objectivity is an illusion, and collective beliefs can be put down to cultural traits. These relativist theories contradict basic sociological observations: today, as yesterday, individuals have strong moral convictions. We must not abandon notions of truth. Theft and fraud go against the touchstone of reciprocity which prohibits pure appropriation of others’ goods. Theft is wrong because social order is based on the notion that all reward should, in theory, correspond to a contribution. It is imperative to strengthen the ethical values that we can all share. The use of ethical discourse as a set of moral principles presupposes that we are all bound by a mutual understanding of what they imply.