Vincent Guillin uses the issue of sexual equality as a prism through which to examine important differences - epistemological, methodological and theoretical - between Auguste Comte and John Stuart Mill. He succeeds in showing how their differing conceptions of science and human nature influence and affect their respective approaches to philosophy and to the analysis of female (in)equality in particular. Guillin shines a bright searchlight into long-neglected aspects of both men's thinking - for example, Mill's proposal to construct an 'ethology', or science of character-formation, and...