In part because of a man named Elijah Baley, an Earthman." Pelorat put in excitedly, "He is the culture-hero I mentioned some time ago, Golan." "A cu… - Isaac Asimov

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In part because of a man named Elijah Baley, an Earthman."
Pelorat put in excitedly, "He is the culture-hero I mentioned some time ago, Golan."
"A culture-hero, sir?"
"What Dr. Pelorat means," said Trevize, "is that he is a person to whom much was attributed, and who may have been an amalgamation of many men in actual history, or who may be an invented person altogether."
Daneel considered for a moment, and then said, quite calmly, "That is not so, sirs. Elijah Baley was a real man and he was one man. I do not know what your legends say of him, but in actual history, the Galaxy might never have been settled without him.