Fisher's Fundamental Theorem of natural selection is one of the most widely cited theories in evolutionary biology. Yet Price and Ewens have argued that the standard interpretation of the theorem is very different from what Fisher meant to say. What Fisher really meant can be illustrated by looking in a new way at Cooke et al.'s model for the evolution of clutch size. Why Fisher was misunderstood depends, in part, on the contrasting views of evolution promoted by Fisher and Wright.