 Even if the decision to put only Mill’s name on the cover of the Principles could be explained as an expedient to win greater acceptance for the ideas within, there would have been little harm in describing her as its co-author in this dedication if she were such, especially once the decision was made only to paste it inside copies of the Principles given to personal friends. On the other hand, though, his annotated bibliography does describe the Principles as a “joint production with my wife” (MacMinn et al. 1945,  69).[4]  And Taylor Mill was actively involved in revising portions of the later editions of the Principles. For example, the second (1849) edition is considerably more favorable to Socialism and even Communism, and the impetus for this shift seems to have been a change in Taylor Mill’s thinking. In a letter written to Taylor Mill early in 1849, Mill points out that she now “had marked dissent” from a passage in the first edition raising an objection to Communism that “was inserted on your proposition &amp; very nearly in your own words.” He continues, though, that