Natural selection. Weaker hospitals find today's climate is a jungle.

Most hospital executives would probably agree that it's a jungle out there. In today's competitive market, it's survival of the fittest. Some observers say the healthcare industry's version of Darwinism might not be such a bad thing. The demise of weaker hospitals thins overcapacity and helps control costs. But others say it has gone too far, becoming an unhealthy evolution that's not just winnowing the weak but also bringing down the strong.