Karl Marx completed the preface to his flagship work, "Das Kapital," on this day in 1867. The first edition was published in German in the same year, changing the class struggle forever.which put forward a sharp analysis that exposed capitalism like nothing before. 1867年的今天，卡爾·馬克思完成了他的旗艦著作《資本論》的序言。同年德文第一版出版，永遠(yuǎn)改變了階級(jí)斗爭。它提出了尖銳的分析，揭露了資本主義。