ABSTRACT: In this paper, I distinguish between two families of theories which view moral norms as either “inputs” or “outputs.” I argue that the most plausible version of each model can ultimately be seen as the two sides of the same model, which I call Moderate Nativism. The difference between these two apparently antagonistic models is one of perspective rather than content: while the Input model explains how emotional dispositions constrain the historical evolution of moral norms, the Output model explains how these same dispositions naturally give rise to corresponding moral judgments in individuals.