"There were a few human beings who gradually, through the process of invention and experiment, built and operated, first, local river and bay, next, along-shore, then off-shore rafts, dugouts, grass boats, and outrigger sailing canoes. Finally, they developed voluminous rib-bellied fishing vessels, and thereby ventured out to sea for progressively longer periods. Developing ever larger and more capable ships, the seafarers eventually were able to remain for months on the high seas. Thus, these venturers came to live normally at sea. This led them inevitably into world-around, swift, fortune - producing enterprise. Thus they became the first world men."