Let us dwell for a moment more closely on one phase of this record of the conquest of distance. The crucial feature in that struggle was the conquest of the sea. The sea-surface of the world is far greater than its land-surface, and the sea, once subdued, is a far easier and more natural means of transport and communication. For the sea, the uncultivable sea, as Homer calls it, is itself a road, whereas on earth, whether it be mountain or desert or field, roads have first painfully to be made. Man's definitive conquest of the sea dates from the middle of the fifteenth century when, by improvements in the art of sailing and by the extended use of the mariner's compass, it first became possible to undertake long voyages with assurance. These discoveries are associated with the name of Prince Henry of Portugal, whose life-long ambition it was, to quote the words engraved on his monument at the southern extremity of Portugal, 'to lay open the regions of West Africa across the sea, hitherto not traversed by man, that thence a passage might be made round Africa to the most distant parts of the East.' The opening of the high seas which resulted from Prince Henry's activities is one of the most momentous events in human history. Its effect was, sooner or later, to unite the scattered families of mankind, to make the problems of all the concern of all: to make the world one place. Prince Henry and his sailors were, in fact, the pioneers of internationalism, with all the many and varied problems that internationalism brings with it. 'In 1486,' says the most recent history of this development, Bartholomew Dias was carried by storm beyond the sight of land, round the southern point of Africa, and reached the Great Fish River, north of Algoa Bay. On his return journey he saw the promontory which divides the oceans, as the narrow waters of the Bosphorus divide the continents, of the East and West. As in the crowded streets of Constantinople, so here, if anywhere, at this awful and solitary headland the elements of two hemispheres meet and contend. As Dias saw it, so he named it, 'The Cape of Storms'. But his master, John II, seeing in the discovery a promise that India, the goal of the national ambition, would be reached, named it with happier augury 'The Cape of Good Hope'. No fitter name could have been given to that turning-point in the history of mankind. Europe, in truth, was on the brink of achievements destined to breach barriers, which had enclosed and diversified the nations since the making of the World, and commit them to an intercourse never to be broken again so long as the World endures. That good rather than evil may spring therefrom is the greatest of all human responsibilities.[55]