美国学者哈尔·德雷珀在《马克思和无产阶级专政》中声称,他查阅了马恩四十多卷近七百万字的著作,只发现十一篇文章和两次讲话共十八处使用过“无产阶级专政”的术语,而且集中在1850——1852年、1871——1875年,1891——1895年三个时期。另一美国学者查理·N·亨特在《马克思和恩格斯的政治思想》一书中,以德雷珀的见解为基础,进一步研究了马恩每一次使用“无产阶级专政”概念的历史背景,直接得出了“无产阶级专政”这个 The American scholar Hal Draper asserted in Marx and the dictatorship of the proletariat that he consulted more than 40 volumes of nearly 40 million works published by Marne and found only eleven articles and 18 essays for two speeches Used the term “proletarian dictatorship” and focused on three periods: 1850-1852, 1871-1875, 1891-1895. Another American scholar, Charlie N. Hunt, further explores the historical background of every use of the concept of “proletarian dictatorship” by Marx and Engels in his book “Political Thoughts” by Marx and Engels. Directly derived the “proletarian dictatorship.”