In science, if we did that we would arrive to experience. Laws work because they make good predictions and that´s all there is to it. In Mathematics if we kept asking why we would arrive to axioms. But what about ethics? It´s not based on axioms or experience. Then, what is it based on? If there´s nothing in the bottom then it´s just ungrounded. If it´s based on our moral intuitions then ethics is useless because: 1) different people have different moral intuitions; 2) if ethics is based on our moral intuitions, then we don´t need ethics. We´d be better off following our moral intuitions directly instead of worrying about philosophy. What are your thoughts on this?