Brian Charlesworth FRS FRSE (born 29 April 1945)[4] is a British evolutionary biologist at the University of Edinburgh,[5] and editor of Biology Letters.

[14] In April 2010, the journal Philosophical Transactions of the Royal Society B was dedicated to honour Brian's contribution to the field of population genetics.

His nomination for the Royal Society reads: Distinguished for his theoretical and experimental studies of population genetics and evolutionary biology.

He made major contributions to the theory of the related topics of selection for the rate of genetic recombination, the evolution of complexes of tightly linked genes and the evolution of separate sexes and outbreeding, and showed experimentally that recombination rates could be changed by selection.

It recognizes the full body of work of an exceptional geneticist," according to the Thomas Hunt Morgan Medal webpage.