Common Ancestry and Natural Selection in Darwin’s Origin

by Elliott Sober

This is a précis of an argument that I developed in an article called “Did Darwin Write the Origin Backwards?” The article was published in 2009 and may be found on my web set at http://philosophy.wisc.edu/sober/recent.html. An expanded version of the argument is the first chapter of a book that

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The Challenge of Comparisons in Primatology

by Karen B. Strier

I have been studying the same group of monkeys, known as northern muriquis, in a small forest in southeastern Brazil for nearly 28 years. When I began my research they were called Brachyteles arachnoides. Subsequently, and within the lifetimes of many of the individuals in my original study group, they were

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