Walsh argues that norms are ‘constitutively perspectival’ natural phenomena. They arise from a capacity of agents—including all organisms—to ‘take a perspective’ on their circumstances. Constitutively perspectival phenomena are not naturalistically problematic: other examples include colours. The concept of a perspective plays two roles here: methodological and metaphysical. Walsh draws on scientific perspectivism to show what a science of the normative might look like and why it has been opaque to traditional forms of naturalism. Walsh draws on the recently emerging ecological approach to agency to demonstrate how agency gives rise to a battery of ineliminably perspectival phenomena—including colours and norms.