“Reason is...the slave of the Passions”

  How is Humeʼs dictum that “Reason is...the slave of the Passions” significant for the history of ethics? What is the significance of the distinction Blackburn makes between ʻreasonsʼ and “Reason”? Blackburn floats Aristotelianism as a possible remedy for the condition of Ethics as bequeathed by Hume. How is Aristotelianism meant to rehabilitate ethics and what problems does Blackburn find with that project?