John Avise, distinguished professor of ecology and evolutionary biology at UC Irvine, has published a new book titled On Evolution.The book — comprised of essays rewritten from his previously published articles — is the first single-volume collection of Avise’s work. The essays reveal Avise’s unique perspectives on major topics in evolutionary biology, from how to define a species to the connections between conservation and evolutionary biology. Avise’s research on mitochondrial DNA helped create the discipline of phylogeography, and his broader contributions to numerous aspects of molecular ecology, evolution and conservation are also widely recognized.