The Free Discussion between Richard Price and Joseph Priestley (1778) originated as a correspondence between the two after the publication of Priestley's Disquisitions on Matter and Spirit, his most important philosophical work (1777). At the time it was thought remarkable that a controversey such as this could be conducted so amicably, but then the two were close friends. Nevertheless their philosophical, as opposed to their oft mentioned political views, were at opposite ends of a spectrum.

This is a biography of the works of Richard Price, 1723-1791, one of the leading radical intellectuals of the late-18th century. By profession a dissenting minister, he was also a mathematician, a political pamphleteer, particularly on the American and French Revolutions, and a moral philosopher.

This is a comprehensive reference source on 18th-century authors writing in the English language about philosophical ideas and issues. It features authors taken from 1689 through to the mid-19th century, the period beginning with John Locke and ending with Dugald Stewart. The word philosophical is used in a wide, 18th-century sense. Therefore, the Dictionary includes epistemology, ethics, aesthetics, education, politics, rhetoric, science, medicine, biology, geology, chemistry and theology.