Andrew Marr discusses the role of the public intellectual on Start the Week. The French philosopher, journalist and activist Bernard-Henri Levy flexes his muscles as he sets out his views on everything from literature to politics and fame, Baroness Mary Warnock looks at morality and what philosophers can add to the current debates about privacy, society and fairness, while Roger Scruton argues that his 'green philosophy' finds a natural home in right wing politics. Producer: Katy Hickman.