Over in the West, though, secular visions of galactic salvation began to emerge too. Another influential figure was the American engineer Robert Goddard, who created the first liquid-fuelled rocket. In 1918, he wrote a little-known short essay called the "Final Migration: A Note for Optimists" that he circulated among friends. "There he says if we can unlock the atom, we can send humans beyond the Solar System," says Moynihan. 

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