Farrer’s work is a strong argument for freedom against determinism, which won wide praise from fellow philosophers, including his Oxford colleague P. F. Strawson. The work is dominated by a didactic assessment of libertarian and determinist arguments, in which the full weight of the determinist argument is given credence. Yet the fulfilment of the work places ultimate credence to the role of creativity and invention as the primary action of the will.

KEY WORDS: Tautology, Descartes, Aristotle, epiphenomena, Determinism, Libertarianism, Casuistry, freedom, invention