""A Dissertation Upon Parties"" is a collection of letters written by Henry St. John, also known as Bolingbroke, to Caleb D'Anvers. The book is a political treatise that discusses the nature of political parties and their role in government. The letters address topics such as the dangers of factions, the importance of balance in government, and the need for compromise and cooperation between parties. The book also includes a biography of the author,...