The first modern usage of the term (in English) starts with an article written by GW Harris in an article for the "New Age" in 1911 in which he advocates the liquidation of "lunatics" by 'state lethal chamber'. The concept then starts to gather pace in the 19th century with Walter Bagehot's work "Physics and Politics" in which he reflects on the term as if he was a trained scientist in the form of Jakob von Uexküll. Bagehot didn't have a scientifically trained mind such as von Uexküll so he (Bagehot) falls rather short in the explanation of the term. Nevertheless the book has some novel points particularly on the subject of natural selection and politics. Previous notions of the concept can actually be traced back to the Middle Ages in John of Salisbury's work "Policraticus" in which the coined term body politic is actually used.