On his retirement and after the death of his wife, Mill was recruited to stand for a Parliamentary seat. Though he was not particularly effective during his one term as an MP, he participated in three dramatic events. (Capaldi 2004, 326-7). First, Mill attempted to amend the 1867 Reform Bill to substitute “person” for “man” so that the franchise would be extended to women. Though the effort failed, it generated momentum for women’s suffrage. Second, he headed the Jamaica Committee, which pushed (unsuccessfully) for the prosecution of Governor Eyre of Jamaica, who had imposed brutal martial law after an uprising by blacks. Third, Mill used his influence with the leaders of the laboring classes to defuse a potentially dangerous confrontation between government troops and workers who were protesting the defeat of the 1866 Reform Bill.
While this characterization is true, it needs qualification. The Meditations and the Ethics are very different works, not just in substance, but also in style. In order to understand this difference one must take into account the distinction between two types of geometrical method, the analytic and the synthetic. Descartes explains this distinction as follows: