Unit 5 The Sad Young Men背景介绍(5)

The decade is also seen as a period of rising intolerance(偏执) and isolation: chastened(抑制) by the first world war, historians often point out that Americans retreated into a provincialism (偏狭观念) evidenced by the rise of the Ku Klux Klan(is a secret organization of white Protestant men in the U S ,which promotes violence against black people ,Jews ,and other minorities), the anti radical hysteria of the Palmer raids, restrictive immigration laws, and prohibition(禁酒).