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"Charles Darwin published 'The origin of species,' his revolutionary treatise on evolution, in 1859. Even today, the theory of evolution creates tension between the scientific and religious communities. This same debate raged within Darwin himself and played an important part in his marriage: Emma's faith gave Charles a lot to think about as he worked on his controversial theory. His wife's religious convictions made him rethink how the world would receive his ideas"--From publisher description.