Even if people with lively imaginations have tried to picture the Egyptian pyramids being build by a vast army of workers using the 'heave-ho' method, a similar method would have been impossible on Easter Island for lack of manpower. A maximum of 2,000 men was not nearly enough to carve these colossal figures out of the steel-hard volcanic stone with rudimentary tools, even if they worked day and night. For at least a part of the population must have tilled the barren fields and gone fishing, and a few of them must have woven cloth and made ropes. No, 2,000 men alone could not have made the gigantic statues. And a larger population is inconceivable on Easter Island. Then who did do the work? And how did they manage it? And why do the statues stand round the edge of the island and not in the interior? What cult did they serve?

Unfortunately the first European missionaries on this tiny patch of earth helped to ensure that the Island's dark ages stayed dark. They burnt the tablets with hieroglyphic characters, they prohibited the ancient cults of the gods and did away with every kind of tradition. Yet thoroughly as the pious gentlemen went to work, they could not prevent the natives from calling their island the 'Land of the bird men', as they still do today. An orally transmitted legend tells us that flying men landed and lit fires in ancient times. The legend is confirmed by sculptures of flying creatures with big staring eyes.

Connexions between Easter Island and Tiahuanaco automatically force themselves upon us. There as here, we find stone giants belonging to the same style. The haughty faces with their stoic expressions suit the statues—here as there. When Francisco Pizarro questioned the Incas about Tiahuanaco in 1532, they told him that no man had ever seen the city save in ruins, for Tiahuanaco had been built in the night of mankind. Traditions call Easter Island the 'navel of the world'. It is more than 3,125 miles from Tiahuanaco to Easter Island. How can one culture possibly have inspired the other?

Perhaps pre-Inca mythology can give us a hint here. In it the old god of creation, Viracocha, was an ancient and elemental divinity. According to tradition Viracocha created the world when it was still dark and had no sun; he sculptured a race of giants from stone and when they displeased him, he sank them in a deep flood. Then he caused the sun and the moon to rise above Lake Titicaca, so that there was light on earth. Yes, and then—read this closely—he shaped clay figures of men and animals at Tiahuanaco and breathed life into them. Afterwards he instructed these living creatures of his own creation in language, customs and arts, and finally flew some of them to different continents which they were supposed to inhabit thenceforth. After this task the god Viracocha and two assistants travelled to many countries to check how his instructions were being followed and what results they had had. Dressed as an old man, Viracocha wandered over the Andes and along the coast, and often he was given a poor reception. Once, at Cacha, he was so annoyed by his welcome that in a fury he set fire to a cliff which began to burn up the whole country. Then the ungrateful people asked his forgiveness, whereupon he extinguished the flames with a single gesture. Viracocha travelled on, giving instructions and advice, and many temples were erected to him as a result. Finally he said goodbye in the coastal province of Manta and disappeared over the ocean, riding on the waves, but he said he intended to come back.

The Spanish conquistadores who conquered South and Central America came up against the sagas of Viracocha everywhere. Never before had they heard of gigantic white men who came from somewhere in the sky. Full of astonishment, they learnt about a race of sons of the sun who instructed mankind in all kinds of arts and disappeared again. And in all the legends that the Spaniards heard, there was an assurance that the sons of the sun would return.

Although the American continent is the home of ancient cultures, our accurate knowledge of America is barely 1,000 years old. It is an absolute mystery to us why the Incas cultivated cotton in Peru in 3000 B.C. although they did not know or possess the loom. The Mayas built roads, but did not use the wheel, although they knew about it. The fantastic five-strand necklace of green jade in the burial pyramid of Tikal in Guatemala is a miracle. A miracle because the jade comes from China. The sculptures of the Olmecs are incredible. With their beautifully helmeted giant skulls, they can only be admired on the sites where they were found, for they will never be on show in a museum. No bridge in the country could stand the weight of the colossi. Until recently we could only move smaller 'monoliths' weighing up to fifty tons with our modern lifting appliances and loaders. Only now have cranes which can handle hundreds of tons been developed. But our ancestors could do so. How?

It even seems as if the ancient peoples took a special pleasure in juggling with stone giants over hill and dale. The Egyptians fetched their obelisks from Asswan, the architects of Stonehenge brought their stone blocks from south-west Wales and Marlborough, the stonemasons of Easter Island took their ready-made monster statues from a distant quarry to their present sites and no one can say where some of the monoliths at Tiahuanaco come from. Our remote ancestors must have been queer people; they liked making things difficult for themselves and always built their statues in the most impossible places. Was it just because they liked a hard life?

I refuse to think that the artists of our great past were as stupid as that. They could just as easily have erected their statues and temples in the immediate vicinity of the quarries if an old tradition had not laid down where their works ought to be sited. I am convinced that the Inca fortress of Sacsayhuaman was not built above Cuzco by chance, but rather because a tradition indicated the place as A holy spot. I am also convinced that in all the places where the most ancient monumental buildings of mankind were found the most interesting and important relics of our past lie still untouched in the ground, relics, moreover, which could be of tremendous importance for the further development of present-day space travel.

The unknown space travellers who visited our planet many thousands of years ago can hardly have been less farsighted than we think we are today. They were convinced that one day man would make the move out into the universe on his own initiative and using his own skills.

It is a well-known historical fact that the intelligences of our planet have constantly sought for kindred spirits, for life, for corresponding intelligences in the cosmos.

Present-day antennae and transmitters have broadcast the first radio impulses to unknown intelligences. When we shall receive an answer—in ten, fifteen or a hundred years—we do not know. We do not even know which star we should beam our message at, because we have no idea which planet should interest us most. Where do our signals reach unknown intelligences similar to human beings? We do not know. Yet there is much to support the belief that the information needed to reach our goal is deposited in our earth for us. We are trying hard to neutralise the force of gravity; we are experimenting with elementary particles and anti-matter. Are we also doing enough to find the data which are hidden in our earth, so that we can at last ascertain our original home?

If we take things literally, much that was once fitted into the mosaic of our past with great difficulty becomes quite plausible: not only the relevant clues in ancient texts, but also the 'hard facts' which offer themselves to our critical gaze all over the globe. Lastly we have our reason to think with.

So it will be man's ultimate insight to realise that his justification for existence to date and all his struggles to advance really consisted in learning from the past in order to make himself ready for contact with the existence in space. Once that happens, the shrewdest, most die-hard individualist must see that the whole human task consists in colonising the universe and that man's whole spiritual duty lies in perpetuating all his efforts and practical experience. Then the promise of the 'gods' of peace on earth and that the way to heaven is open can come true.