 From 1976 to 1983 he was a full-time writer.In this period much of his political activities and writing involved radical critiques of science, technology and medicine.His contribution in this area has been compared by historian Gary Werskey with that of J. D. Bernal (While this is Werskey's opinion, it was not, according to Francis Aprahamian, Bernal's research assistant for "Science in History", a view shared by J.D.