The <em>Robber Barons</em> were millionaire entrepreneurs and owners of half of the Unites States in the last third of the 19th century. These men were the influencers of all the politicians of that time because they extorted the main ones in power; as we know, the money controls the world, commonly nobody can resist to the money.
Some historians consider the <em>Robber Barons</em> as boosters of the United States economy, before their apparition the country were an agricultural country and thanks they it becomes as an industry.
Finally, we will mention the most named <em>Robber Barons</em> and their principles contributions to the country:
John D. Rockefeller, First oil monopoly.
Andrew Carnegie, Cranegie Steel Company.
Cornelius Vanderbilt, Grand Central Depot.
J.P. Morgan, General Electric, bought Carnegie's company and founded the U.S. Steel.
