Observations of animals engaging in apparently moral behaviour have prompted the question of whether morality is shared between humans and other animals, with little agreement on the answer. Some philosophers explicitly argue that morality is unique to humans, because moral agency requires capacities that are only demonstrated in our species. Other philosophers argue that some animals can participate in morality because they possess these capacities in a rudimentary form, or because the touted capacities are not necessary for moral participation. Empirical research programs on possible moral capacities such as fairness and empathy have seen scientists joining in these debates. We argue that the current debate suffers because discussions oft...