The writings of Adam Smith set forth the theory of capitalism.
<span>Marketing's sole purpose is to convince consumers that a certain product will <span>add to their overall utility, or satisfaction one gets from a good.</span></span>
The oil industry helped the railroad industry expand. With crude and refined oil needing to be transported in large quantities, trains were an efficient method to transport across long distances. The railroad industry was able to open thousands of miles of tracks to reach all corners of the country.
