My only regret is that I had entered the field of evolutionary biology too late to have met Kimura. Although the neutral theory has perhaps had the most ranging effect, I would rather place his work with diffusion models as his most important contribution. This collection puts together the beautiful diffusion papers written by Kimura on the subjects of fixation probability, quantitative genetics and more -- including the hard-to-get work in Applied Probability! One of the most valued books in my collection.