Forty years on, the sixties look like the last great outpouring of optimism and idealism, signalled in that incredible year of 1968. How do we look back at the sixties now? What do activists then think of society and politics now? Does idealism exist anymore in the face of criticism of multiculturalism and looming environmental disaster? Is liberalism now doing more damage than good?
Sheila Rowbotham, socialist feminist theorist and writer with a long history of activism, is the author of the memoir Promise of a Dream: Remembering the Sixties.
Peter Doggett is the author of the recently published There's a Riot Going On: Revolutionaries, Rock Stars, and the Rise and Fall of 60s Counterculture.
Stuart Christie is a Glaswegian anarchist writer, well known for his attempt to assassinate the Spanish dictator Francisco Franco in 1964. His autobiography, Granny Made Me an Anarchist, was published in 2004.
Peter Tatchell is a human rights campaigner and a member of the queer rights group OutRage! and the left wing of the Green Party. He is the Green Party's parliamentary candidate for Oxford East.
Andrew Anthony is an Observer and Guardian journalist, and member of the liberal left. His latest book, The Fallout, is about broken dreams, darkened illusions and big questions that no longer match their received answers.
Chaired by Professor Mike Gonzalez, University of Glasgow.