“No one, absolutely no one is irreplaceable, which is a depressing realization. A workplace is like a microcosm of nature, ruled by laws of evolution: As one species dies out and the whole system is destabilized, an efficient mechanism kicks in to ensure the survival of everyone else, and before long there is a new system, a new balance. Nature's sole purpose is survival, and the same is true of capitalism: A company is like a self-generating animal, a starfish that grows a new arm if a new arm is needed.”