While browsing Walter Williams' website, I came across a paragraph that really makes Capitalism simple. Here it is:
"But how do people earn money in a free society? Let's take the extreme example of billionaire Bill Gates, founder of Micro-Soft. There is no evidence that Gates enslaved or robbed anyone. There's a lot of evidence that millions of common people like you and me voluntarily gave him money for software programs that make life easier and more pleasurable like Windows, DOS and other products. Gates served us well and he's rich because millions upon millions of independent decision makers agreed his products were superior to the next best alternative."
Walter E. Williams