Forty years ago, in 1972, Britain faced a sharp and qualative change and teetered on the verge of a general strike for the first time in nearly 50 years. A wave of factory occupations and sit-ins had swept the country. More than 23 million days were lost in strike action, excluding 4 million lost through political strikes. Only once, in the revolutionary year of 1919, was the number of days lost greater. The Tories, in a pamphlet misnamed In Defence of Peace, were already digesting the writings of Brigadier Kitson, who urged the army to be prepared for civil unrest. The spectre of revolution was once again beginning to haunt Britain.