The 100 Greatest Welshmen is a veritable goldmine of a book.Did you know that Wales can boast the man who made possible the Internet, the world’s first football superstar, the patron saint of computer technicians, America’s greatest pathfinder, the founder of socialism, Europe’s greatest legend, an American Public Enemy No. 1, the pioneer of cinema, the first British historian, the world’s greatest pirate, the 20th century’s most important liberal thinker, America’s greatest architect, the man who won the First World War, five of the first six presidents of the United States of America and the world’s most successful buccaneer?