Mr. Flinders Petrie, in his "Revolutions of Civilization," has demonstrated that civilization comes in waves, that races rise to a pinnacle of power and culture, and decline from that, and fall into decadence, from which they do not emerge until there has been a crossing of races, a fresh intermingling of cultures. He showed in ancient Egypt eight such periods, and after every decline into decadence there was an invasion, the necessary precedent to a fresh ascent with reinvigorated energies. I prefer to dwell upon the final human results of this commingling of races than upon the tyrannies and conflicts which made it possible. The mixture of races has added to the elemental force of the Celtic character a more complex mentality, and has saved us from becoming, as in our island isolation we might easily have become, thin and weedy, like herds where there has been too much in-breeding. The modern Irish are a race built up from many races who have to prove themselves for the future. Their animosities, based on past history, have little justification in racial diversity today, for they are a new people with only superficial cultural and political differences, but with the same fundamental characteristics. It is hopeless, the dream held by some that the ancient Celtic character could absorb the new elements, become dominant once more, and be itself unchanged. It is equally hopeless to dream the Celtic element could be eliminated. We are a new people, and not the past, but the future, is to justify this new nationality.