Meat is was and will remain in the first world diet.There is no thing to really debate about the number one food stuff of man.History does speak for itself.
There is an issue as far as carbs and there effect with animal foods.Paleo or Primal/with dairy is low carb and irritant removal focused.
This is tested by application as far as how one feels and performs.This works well in sports fitness as well as health challenged.
Veganism is steeped in emotional weakness and denial of human tradition.Meet your farmer that raises the pastured and free range foods and all will be well.My farmer is 33 miles away and the eggs are glorious.