John Tusa and guests discuss the impact of the tumultuous world events of 1968, from civil rights marches in the US to riots in Paris and violence in Prague.
Contributors include Peter Hain, Joan Bakewell, Martin Kettle and Ann Leslie.
John Tusa recalls events in France during May 1968.
Students and police fought pitched battles on the streets of Paris, hurling paving stones and tear gas.
There were massive demonstrations and a general strike brought France to a virtual standstill.
Some people wondered if the country might be on the brink of revolution.
What was the long-term effect of those weeks of turmoil?
In Prague, John is joined by those who witnessed the Soviet invasion of Czechoslovakia.
He revisits the events of August 26 in Chicago, when the Democrats met to choose their presidential candidate.
Thousands of anti-Vietnam War protesters had also made their way to the city, and the event soon became mired in acrimony and violence.