Vivid Faces surveys the lives and beliefs of the people who made the Irish Revolution: linked together by youth, radicalism, subversive activities, enthusiasm and love. Determined to reconstruct the world and defining themselves against their parents, they were in several senses a revolutionary generation.

The Ireland that eventually emerged bore little relation to the brave new world they had conjured up in student societies, agit-prop theatre groups, vegetarian restaurants, feminist collectives, volunteer militias, Irish-language summer schools, and radical newspaper offices. Foster's book investigates that world, and the extraordinary people who occupied it.