Summary
For the genesis of Atlantis we have then, first, the great idealist philosopher Plato minded to compose an instructive pseudo-historical romance of statesmanship and war and actually making a beginning of the task; and, secondly, the fragmentary cues and suggestive data which came to him out of tradition and mariners’ tales, perhaps in part through Solon and intervening transmitters, in part more directly to himself. Of this material we may name foremost the vague knowledge of vast impeded regions in the Atlantic believed to be shallow and requiring a physical explanation; then rumors of cataclysms and sunken lands in the same ocean; then legends of ancient hostilities between dwellers beyond the Pillars of Hercules and the peoples about the Mediterranean; and finally the reflection of the Persian war on the shadowy ancient past of Athens—Athens the defender and victor, Athens the Queen of the Sea.
Every solution of the Atlantis problem must be conjectural. The above is offered simply as the best conjecture to which I can see my way.