Matt made major research contributions into our understanding of sperm competition, and conducted ground-breaking research into the role of sexual selection in extinction, inbreeding and the effects of thermal stress on fertility. Most significant of all, Matt exemplified how to do it right — how to be an effective and inspiring research leader, colleague and teacher. He had a unique brand of incisiveness, a keen mind, great wit and a seemingly bottomless generosity of spirit. This set of qualities represents a very rare legacy.