Abstract. Following in general a history of religions analysis, the paper argues that myth lays a basis for morality in that it sets forth a picture of “how things really are” (the is), to which humans seek to conform their actions (morality, the ought). A parallel argument locates the capacity for morality and values orientation in the process of evolution itself. A hypothesis is formulated concerning the function of myth in the emergence of Homo sapiens, namely, to motivate the action required if creatures so culturally formed as humans were to survive. The Christian love command (understood as altruism) is interpreted as an example of the general hypothesis.