I satisfied my Darwinophilia today with an article on George Price (1922-1975), a geneticist and evolutionary theorist. Price contended that altruism in nature could be explained by evolution. His equation, creatively named the Price Equation, provided a model for this pattern. Altruism occurs in his model when a certain action increases both the fitness of the organism and the average fitness of its population (or possibly, community).
Price diesplayed altruism in his own life, at one point housing four homeless people in his house, as he slept in his office. Mentally unstable for much of the later part of his life, he commited suicide at the age of 52.