A few hours before his sudden death last year in Bonn, Hajo Holborn remarked that in spite of the ill health of his last years his life had been a happy one. He had an unusually successful career in his beloved profession, first as a young man in Germany, then as a leading scholar in his field in the United States; and he was able to finish his magnum opus, A History of Modern Germany, before his death. Its first volume appeared in 1959; its third and last, in 1969. As a disciple of Wilhelm Dilthey and of Friedrich Meinecke, Holborn gave special attention to the “realm of ideas,” to the religious, intellectual, and artistic achievements of Germany. While he wrote primarily political history and succeeded in ordering the mass of information which he provides into a meaningful narrative which holds the reader's interest, the high points are his discussion of the thinkers and poets from Germany's rapid cultural rise in the late eighteenth century to its decline after the mid-nineteenth century. One of the best of these subchapters is the one on Marx and Engels, a masterpiece of objectivity. It is to be found in the second volume of the History, though chronologically Marx and Engels belong in the third volume, which covers the period from 1840 to 1945. (After all, the two young men met and their public activity began only after 1840 and their thought and dedicated life began to exercise their impact only decades later.) By 1945, when Holborn's History ends, Marx had become the most widely known German, whose influence shaped history on a worldwide scale and to a degree surpassing by far that of the other great German with whom Holborn starts his History, Martin Luther.