Philip Bartlett Smith was an American-Dutch experimental physicist. He taught for eight years in Brazil as a McCarthy-era exile, and later joined the University of Groningen as a Professor of Physics, where he remained until his retirement in 1988. He was a member of the Board of Pugwash Netherlands until 2003. He had a tense relationship with his native US, which he labelled “The Holy American Empire” and whose power policy he abhorred. After his retirement he concentrated on the subjects of deep economics. He was co-editor with S.E. Okay, J. de Wilde and P. Deshingkar of The World at the Crossroads: Towards a sustainable, equitable and lovable Congress ‘Challenges of Sustainable Development’, Amsterdam, August 1996.