David Aaronovitch assesses the legacy of 1968, talking to the self-styled revolutionaries of 40 years ago. He talks to Foreign Office minister Kim Howells, then a leader of the Hornsey Art College occupation. Feminist Sheila Rowbotham recalls the communal house she was living in. John Birt explains why his rigorous reforms as BBC director general followed on from his youthful anti-establishment views. Right-wing columnist Bruce Anderson talks about his youthful communist self and why he changed, partly as a result of the conflict in his native Northern Ireland Finally, David visits Northern Ireland itself to explore the outcome of the civil rights movement and the aggression it provoked, now seen by many as a crucial step in Ulster's descent into violence.