We examine Adam Smith's seminal works, The Wealth of Nations (1776) and The Theory of Moral Sentiments (1750) and compare the two books. We uncover the differences between the two books and expose a more complete review of The Wealth of Nations to demonstrate Smith's original theories have been omitted in most financial transactions and economic texts. We look at the Capitalist view of capital and the Sustainabilist view of capital to note their theoretical and practical differences. Smith is shown as more than just an "economist" and found of modern economics, but as a complete thinker who views the three forms of capital (natural, human and financial) as inexorably linked to each other.