Mill (1773-1836), British philosopher, political theorist, historian and psychologist was largely responsible for organizing the influential group of Bentham followers that became known as the 'philosophical radicals', which included David Ricardo, Joseph Hume, J. R. McCulloch, George Grote and John Austin. A prolific writer, Mill is remembered mainly as Bentham's chief disciple; for his influence on the radicals and in particular his son John Stuart Mill, the prominent utilitarian thinker. Thoemmes Press are making available two key philosophical works by this eminent early nineteenth-century intellectual figure. is an important work in which Mill attacks Sir James Mackintosh, a leading Whig apologist and critic of the philosophical radicals. Mill defends the utilitarian ethical theory against Mackintosh's article on ethics in the Encyclopaedia Britannica. colourfully demonstrates Mill's belief that the proper aim of human actions and practices was the promotion of human happiness and is a lucid illustration of his psychological and ethical theories. Privately printed in 1830 and subsequently published in 1835 (the delay was due to Mackintosh's death), this rare dissertation is a key work for all scholars of ethics.