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Some philosophers and social and human scientists rule out the possibility of a fruitful cooperation between moral philosophy and social and human sciences, because they believe that social and human sciences and moral philosophy are oriented in totally opposed directions. Social and human sciences are about what there is; moral philosophy about what there ought to be. In my opinion, it is a mistake, which originates from the fact that they don’t take in account some basic principles of moral reasoning (“ought” implies “can” or “no normative difference without factual difference”, etc.) and some moral theories (different varieties of virtue ethics or consequentialism) building bridges between what there is and what there ought to be.