And so they both went to war and in less than two months, Napoleon and the greater part of his army were prisoners of the Germans. The Second Empire had come to an end and the Third Republic was making ready to defend Paris against the German invaders. Paris held out for five long months. Ten days before the surrender of the city, in the nearby palace of Versailles, built by that same King Louis XIV who had been such a dangerous enemy to the Germans, the King of Prussia was publicly proclaimed German Emperor and a loud booming of guns told the hungry Parisians that a new German Empire had taken the place of the old harmless Confederation of Teutonic states and statelets. In this rough way, the German question was finally settled. By the end of the year 1871, fifty-six years after the memorable gathering at Vienna, the work of the Congress had been entirely undone. Metternich and Alexander and Talleyrand had tried to give the people of Europe a lasting peace. The methods they had employed had caused endless wars and revolutions and the feeling of a common brotherhood of the eighteenth century was followed by an era of exaggerated nationalism which has not yet come to an end. THE AGE OF THE ENGINE BUT WHILE THE PEOPLE OF EUROPE WERE FIGHTING FOR THEIR NATIONAL INDEPENDENCE, THE WORLD IN WHICH THEY LIVED HAD BEEN ENTIRELY CHANGED BY A SERIES OF INVENTIONS, WHICH HAD MADE THE CLUMSY OLD STEAM ENGINE OF THE 18TH CENTURY THE MOST FAITHFUL AND EFFICIENT SLAVE OF MAN The greatest benefactor of the human race died more than half a million years ago. He was a hairy creature with a low brow and sunken eyes, a heavy jaw and strong tiger-like teeth. He would not have looked well in a gathering of modern scientists, but they would have honoured him as their master. For he had used a stone to break a nut and a stick to lift up a heavy boulder. He was the inventor of the hammer and the lever, our first tools, and he did more than any human being who came after him to give man his enormous advantage over the other animals with whom he shares this planet. Ever since, man has tried to make his life easier by the use of a greater number of tools. The first wheel (a round disc made out of an old tree) created as much stir in the communities of 100,000 B.C. as the flying machine did only a few years ago. In Washington, the story is told of a director of the Patent Office who in the early thirties of the last century suggested that the Patent Office be abolished, because “everything that possibly could be invented had been invented.” A similar feeling must have spread through the prehistoric world when the first sail was hoisted on a raft and the people were able to move from place to place without rowing or punting or pulling from the shore.