Evolutionary ethics (EE) is a branch of philosophy that arouses both fascination and deep suspicion. It claims that Darwinian mechanisms and evolutionary data on animal sociality are relevant to ethical reflection. This field of study is often misunderstood and rarely fails to conjure up images of Social Darwinism as a vector for nasty ideologies and policies. However, it is worth resisting the temptation to reduce EE to Social Darwinism and developing an objective analysis of whether it is appropriate to adopt an evolutionary approach in ethics. The purpose of this article is to ‘dedemonise' EE while exploring its limits. I shall begin by presenting two ways of integrating a Darwinian way of thinking into the context of social and political sciences: Social Darwinism and what one could label ‘Pro-social Darwinism'. Next I will point out some of the fundamental errors on which Social Darwinism is grounded; this will help in understanding why contemporary evolutionary ethicists cannot possibly hold the views defended by this theory (unless they are inclined to intellectual dishonesty). On the contrary, EE seems more akin to a Pro-social Darwinian approach, except for the fact that it restricts its reflections to theoretical ethics. The second part of the paper (sections 3 to 7) provides a clear and detailed picture of EE as well as an analysis of its relevance at the different levels of ethics (descriptive, meta-, normative and practical). Special focus will be given to questions relating to the genesis of morals and the delicate shift from facts to norms.