In 1886, Carnegie wrote his most radical work to date, entitled "Triumphant Democracy". Liberal in its use of statistics to make its arguments, the book argued his view that the American republican system of government was superior to the British monarchical system. It gave a highly favorable and idealized view of American progress and criticized the British royal family. The cover depicted an upended royal crown and a broken scepter. The book created considerable controversy in the UK. The book made many Americans appreciate their country's economic progress and sold over 40,000 copies, mostly in the US.