Professor Hamish Spencer is a world renowned theoretical population geneticist best known for his work on genomic imprinting, frequency-dependent selection, and the selective maintenance of genetic variation. He uses molecular tools to understand evolutionary processes and enjoys strong collaborative links with scientists across the globe interested in the emerging field of evolutionary developmental biology (evo-devo). Spencer is also a leading authority on the systematics of New Zealand’s Molluscan fauna, and maintains an authoritative website that is used extensively by professionals and amateurs alike. Professor Spencer is an outstanding scientist with a remarkable depth and breadth of knowledge and understanding of the natural world. His recent work on the cousin marriage controversy published in PLos Biology is receiving intense interest worldwide.