Edgar M. Kahn, in his journal article on the 1860 California sojourn, wrote, "Benjamin's life is an example of a man's determination to overcome almost insurmountable barriers by industry, perseverance, and intelligent use of a remarkable brain." This brilliance was recognized by contemporaries; Salomon de Rothschild, in 1861, deemed Benjamin "the greatest mind" in North America. Nevertheless, according to Meade, "he was given to quixotic enthusiasms and was sometimes too cocksure of his knowledge." Ginsburg said of Benjamin, "he rose to the top of the legal profession twice in one lifetime, on two continents, beginning his first ascent as a raw youth and his second as a fugitive minister of a vanquished power." Davis, after Benjamin's death, deemed him the most able member of his Cabinet, and said that the lawyer's postwar career had fully vindicated his confidence in him.