I think it's fairly easy to provide a moral defense of capitalism. It has been - over the last 200 years - the underlying basis for enormous increases in productivity and human welfare and rising living standards, particularly in the United States, and in the industrialized nations but in fact, in most parts of the world.
John C. BogleIt's very difficult for any particular segment of the stock market to sustain superior performance. The watch word for our financial markets is, "reversion to the mean" i.e. what goes up must come down, and it's true more often than you can imagine.
John C. BogleHint: money flows into most funds after good performance, and goes out when bad performance follows.
John C. Bogle