卡尔。马克思和约翰。梅纳德。凯恩斯的经济分析书，修昔底德和爱德华。吉本的历史书则让我们博通古今。

Works of scholarship -- the economic analyses of Karl Marx and John Maynard Keynes, the histories of Thucydides and Edward Gibbon -- provide frameworks for making sense of the past and the present.