The renowned political philosopher Professor Michael Sandel is the BBC's 2009 Reith Lecturer.
In a series of four lectures broadcast on BBC Radio 4 and the BBC World Service, he will argue that we must think of ourselves more as citizens than consumers, and fully engage with our politicians in discussing the large moral questions of the day.
Professor Sandel teaches Harvard's famous
course, which more than 14,000 students have so far taken.
More surprisingly, he is also said to be the inspiration for the Simpsons cartoon's famously "unjust" character Monty Burns.
The first Reith Lecture will be broadcast on BBC Radio 4 on Tuesday 9 June at 0900 BST, and on the BBC World Service on Saturday 13 June at 1800 GMT.
Find out more about this year's lectures - and explore the 80-year archive - on the programme's
where you can also subscribe to the