While I agree that a diet that is largely vegetarian is usually a healthy one and one which leads to longer lifespans if carefully managed, I disagree completely that a completely vegetarian diet is the healthiest. Almost all of the longest lived peoples on earth consume at least some meat. In my opinion, there are far too many unhealthy vegans who don't carefully manage their diets. In many instances, it is they who have made an unnatural diet into a fetish.