American Trotskyist James P. Cannon wrote in his History of American Trotskyism (1942) that "Trotskyism is not a new movement, a new doctrine, but the restoration, the revival of genuine Marxism as it was expounded and practiced in the Russian revolution and in the early days of the Communist International".
James P. Cannon, seorang Trotskyis Amerika, menulis dalam History of American Trotskysm(1942), "Trotskisme bukanlah gerakan baru, sebuah doktrin baru, tetapi restorasi, kebangkitan Marxisme asli seperti yang diuraikan dan dipraktikkan di revolusi Rusia dan pada hari-hari awal Komunis Internasional."