All volumes of Professor Guthrie's great history of Greek philosophy have won their due acclaim. The most striking merits of Guthrie's work are his mastery of a tremendous range of ancient literature and modern scholarship, his fairness and balance of judgement and the lucidity and precision of his English prose. He has achieved clarity and comprehensiveness.
William Keith Chambers Guthrie, 1962 ile ölüm arasında altı cilt halinde yayınlanan, Yunan Felsefesi Tarihi'nde en iyi bilinen bir İskoç klasik bilim adamıydı.
Dulwich College'a girdikten sonra, Guthrie, 1921'de Cambridge Üniversitesi'ne girerek Eric Evan Spicer bursunu Trinity College'a kazandırdı.