Possible Clues:

• David - - , Scottish philosopher, economist and historian 1711-76
• 'Essays Moral and Political' philosopher
• Television newsman who's a Brit
• 'A Treatise of Human Nature' writer
• 'An Enquiry Concerning Human Understanding' essayist
• 'History of England' author David
• David ---, philosopher; Basil ---, late Cardinal
• Scot David
• 'A Treatise on Human Nature' philosopher
• "Reason is ... the slave of the passions" writer