We are a commune of inquiring, skeptical, politically centrist, capitalist, anglophile, traditionalist New England Yankee humans, humanoids, and animals with many interests beyond and above politics. Each of us has had a high-school education (or GED), but all had ADD so didn't pay attention very well, especially the dogs. Each one of us does "try my best to be just like I am," and none of us enjoys working for others, including for Maggie, from whom we receive neither a nickel nor a dime. Freedom from nags, cranks, government, do-gooders, control-freaks and idiots is all that we ask for.
Jan Sapp has written a relatively short history of the symbiosis theory (Evolution by Association, Oxford, 1994). The idea actually goes back into the Nineteenth Century, almost as soon as good microscopes became readily available.
Margulis (and a number of other biologists) believed that symbiosis was more important than Natural Selection in evolution. Gould was in bad odor with other biologists because of his persist undermining of Natural Selection as an agent of evolution. In his and Eldridge's theory of punctuated equilibrium, they argue that Natural Selection often or even usually acts to prevent evolution by preserving successful forms.