Market share does not a monopoly make. It is a control of supply. Think about it, if Ford, GM, Toyota, and Chrysler merged, they would have a (perhaps 90%) dominant share of the market, yet could they charge “what ever they wanted” for a truck? No, they could only charge what someone will pay, or else they just could not sell it. A monopoly can also only exist of no one else can compete. This is only possible with some sort of protection (like patents and exclusive trade privaleges, all government spawned). Making it hard to compete is not unfair, it would be stupid to make it easy. Microsoft is far from a monopoly, they can’t stop any other companies from making software, in fact many many other companies do. Being very good at something does not make a corporation a monopoly, it is not when a company has some high percentage of a market share. Consider Sodium Sulphate mining. It is used in many house hold products, but one company essentially has the market cornered. Are they a monopoly? No, it is just not a good market to move into, a large fixed startup cost and a small margin, it is not worth it for anyone else to get in. If a corporation commits a crime (like fraud) it does not make them a monopoly, nor is it an “unfair business practice”, it is a crime. That is what law suites are for. A company is not to be broken up into little units because of a crime, what will stop the small companies off shot from the large one from committing more crime? Lastly, a market share is simply the percentage of the current market, not of the total possible market or of the market in the future. Before Pepsi, Coke had a huge market share, but was not a monopoly (witness the entrance of Pepsi into the market). Now Pepsi has a nice chunk of a much larger market.