Adam Smith pointed out that there were three things that make us more prosperous, in a general sort of way: freedom to pursue our own self-interest; specialization, which he called division of labor; and freedom of trade.
When Adam Smith was being incomprehensible, he didn't have the luxury of brief, snappy technical terms as a shorthand for incoherence.
Adam Smith's huge failure was the fact that he did not foresee the industrial revolution.