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Although he is rightly called the father of free markets, Wealth of Nations is no justification for amoral greed.
Smith was interested in economic prosperity, but he devoted his career to a single philosophical project, the betterment of life. His genius was to establish economics as a scientific discipline.
Today we don't know much about Adam Smith, the man. He didn't keep a diary. He wrote little correspondence. And he burned his unpublished papers and lectures before he died.
From his friends and colleagues, we do know that his favorite subject was mathematics, that he was a religious skeptic but with an abiding faith in economic freedom, and that he lived most of his life with the only woman he ever really cared about, his mother.