Detailed Instructions: In this task, you are given a question and a context passage. You have to answer the question based on the given passage.
Q: __ was married to Emma Wedgwood, Context: The biologist Lynn Margulis, famous for her work on endosymbiosis, contends that symbiosis is a major driving force behind evolution. She considers Darwin's notion of evolution, driven by competition, to be incomplete and claims that evolution is strongly based on co-operation, interaction, and mutual dependence among organisms. According to Margulis and Dorion Sagan, "Life did not take over the globe by combat, but by networking."
A:
Darwin