马克思给《祖国纪事》杂志编辑部的信、给查苏利奇的复信以及马克思、恩格斯为《共产党宣言》1882年俄文版写的序言,系统地阐述了东方落后国家有可能在一定条件下“跨越资本主义制度的卡夫丁峡谷”直接进入社会主义的思想。这一思想突破了西方发达资本主义国家演进发展的 Marx’s letter to the editorial department of Chronicle of the Motherland, the reply to Chazulic and Marx’s and Engels’ preface to the Russian version of the Communist Manifesto 1882 systematically expounded the possibility that underdeveloped countries may under certain conditions, The Cafudin Canyon that spans the capitalist system goes directly to the socialist ideology. This thought broke through the evolution of the developed capitalist countries in the West