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During the Middle Ages, and indeed, throughout later years...Our boundary was the sea; it was a fixed boundary, and a boundary which none could cross when once there was a united nation able to guard that sea frontier; and it is owing to that, primarily and principally, that we were able to develop in this country our own peculiar civilisation and our own freedom in a security which was alien, at that time, to almost every other nation of the world.
— STANLEY BALDWIN