G. Lowes Dickinson 
Justice and Liberty [PDF ebook] 
A Political Dialogue

First published in 1908, this book takes the form of a discussion between Henry Martin- a professor, Charles Stuart- a banker, and Sir John Harington- a gentleman of leisure, on politics and civilisation. The speakers discuss many topics ranging from forms of society (such as oligarchy or democracy), to the institution of marriage, to the necessity of government.