David W. Petegorsky as author of an acclaimed book on which English Protestant religious reformer, political philosopher, and activist, and and the Diggers organization  ?
Gerrard Winstanley: Gerrard Winstanley (19 October 1609 – 10 September 1676) was an English Protestant religious reformer, political philosopher, and activist during The Protectorate of Oliver Cromwell.
i don't know