He theorized that the self-interest of individuals acting independently will lead to a socially optimal outcome:<ref>[http://www.econlib.org/LIBRARY/Smith/smWN13.html ''Wealth of Nations'', Book IV, Chapter 2]</ref> | He theorized that the self-interest of individuals acting independently will lead to a socially optimal outcome:<ref>[http://www.econlib.org/LIBRARY/Smith/smWN13.html ''Wealth of Nations'', Book IV, Chapter 2]</ref> |