He studied at
St Paul's School, London and
New College, Oxford. In 1908, Watkin became a convert to
Catholicism. a position he upheld in his 1939 pamphlet
The Crime of Conscription. In 1927, Watkin befriended the exiled Italian priest Don
Luigi Sturzo, whose work Watkin would later publish in the
Dublin Review. Watkin's best known works were
Philosophy of Mysticism (1920) and
A Philosophy of Form (1938). He has been described as "one of the few non-Thomist Catholic philosophers of the early twentieth century." In 1930, Watkin translated
Jacques Maritain’s French edition of “An Introduction to Philosophy” into English. ==Pacifism==