The internet is a great thing. I've posted this link before, but if you haven't checked it out you really should poke through The Collected Papers of R.A. Fisher. There is so much archived genius on the internet; sometimes I wonder what a Ramanujan would have done with all the access to great thought.... (let's hope he wouldn't have spent his time on YouTube!). The Correlation Between Relatives on the Supposition of Mendelian Inheritance is probably one of the most important little known papers in the scientific firmament; it definitively fused Mendelianism with a Darwinian view of evolutionary process.