1. Humans have no natural desire to consume meat.
We have no "taste" for it. When people think of eating meat, they immediately think of barbequed ribs or a filet mignon from Outback. Carnivores are primarily after the nutrient-rich organs. If someone were to put a bowl of cherries and a pig's pancreas side by side, which one are you going for?
2. Humans have no natural capability to consume meat.
Leave your ripped up caveman theories at the door. In the wild, humans are epic fail in the carnivore arena. Comparatively speaking, we aren't strong, we aren't fast, we can't smell, we can't see at night, we can't jump high, we can't swim naturally, we can't stay quiet enough to hunt, we have no claws and our teeth and jaws are useless. And, most importantly, unlike all carnivores, we have no hunting or killing instinct. It's a different story when some cute waitress brings your kill to the table with a bottle of K.C. Masterpiece.
All carnivores are capable of killing at birth or shortly thereafter. For the first 13 years of life it is highly unlikely that a human male (much less, a female) could have a prayer of getting hold of a wild animal and killing it. And this is when you are growing the most!
3. Our digestive tracts aren't designed for it.
I won't go too much into this one as there is tons of information on this. Just try swallowing fresh, raw meat whole. Better yet, give it to an infant.
4. Meat is not nutritionally imperative to humans.
All ten essential amino acids as well as every other nutrient for optimum health are found in plants. You get your protein the same place the animals get it - from foods that grow out of the ground. There is a huge misconception about this as the vast majority of people have no understanding of how amino acids work. They believe that not eating meat cannot be "healthy" because of the flabby vegetarian with no energy they see at the office. It should be noted that most vegetarians eat like crap.
I'll leave it at that as I'm a man of few words. I'm looking forward to hearing your feedback on this!
Edited by Trevor, 28 July 2010 - 06:26 PM.