Mark O'Brien is Senior Research Fellow at the Centre for Lifelong Learning, University of Liverpool. A lifelong socialist and trade union activist, his research interests include social and labor history, and labour internationalism. He is the author of WHEN ADAM DELVED AND EVE SPAN (New Clarion Press, 2004), a history of the Peasants' Revolt, and PERISH THE PRIVILEGED ORDERS: A SOCIALIST HISTORY OF THE CHARTIST MOVEMENT(New Clarion Press, 2009).