Replicators: Evolutionary Powerhouses http://library.thinkquest.org/C004367/home.shtml
Replicators are the fundamental units of any process of natural selection. They were first defined by evolutionary biologist Richard Dawkins as any entities of which copies are made. The concept of replicators has diverse applications in a variety of areas, including biology, sociology, linguistics, and philosophy.
Evolutionary Psychology: An Elegant Solution http://www.elsol.org/f_ep.html
Evolutionary Psychology is a relatively new approach that treats the human mind as a product of evolution. According to EP, the human mind consists of mental modules that, like the body's organs, evolved to handle specific adaptive problems.