Sir Ernest Barker FBA was an English political scientist who served as Principal of King's College London from 1920 to 1927.
Dr Barker's book covers a varied field. In the early essays comprised in the volume he strides along the field of history on seven-leagued boots, examining the constitutional development of the Roman Empire, devoting a deeply interesting essay to the study of medieval civilisation,… the book is a series of essays and lectures, written and delivered at different periods of time.” J H. Harley, Fortnightly Review, May 1865-June 1934; London Vol. 129, (Dec 1930)