Anselm on Necessity

This article provides an explanation of Anselm’s understanding of necessity. Anselm did not write much about modality, and what he did write is puzzling. The dominant readings of Anselm see him as having two concepts of necessity, one merely physical or causal, the other logical or “alethic.” This article argues that Anselm has just one concept of necessity, which corresponds best to what is now called broadly logical or absolute necessity, but whose metaphysics is in terms of powers and lacks of power. The rival interpretations of A. D. Smith, Thomas Williams, and Sandra Visser are discussed and criticized in detail.