Do you ever think about how far we've diverted from the path of our pre-historic ancestors and they're eating patterns? Consider how the earliest humans evolved, and what they ate. They were hunter-gatherers and did not evolve with the characteristics of carnivores. Humans aren't made to tear animals apart and eat their flesh. When you look at carnivorous animals, such as wild cats, you can see their teeth are designed to rip and tear, not chew.

Humans evolved from vegetarian creatures. Even our digestive systems are not particularly suited to eating meat. Eating meat is a relatively recent development in human history, most likely born of opportunity and necessity. Perhaps earliest man observed carnivores eating meat, and if they couldn't find any of the natural foods they were used to eating, such as vegetables, berries, nuts and grains, then they might have assumed that eating meat would at least sustain life.

But initially we emulated the creatures we evolved from, herbivores like apes. Even to a prehistoric mind, apes would have looked similar to man, walking primarily upright, with arms and hands. We naturally would have foraged for our food, eating roots and berries, fruits and nuts. We would have watched the apes peeling bananas, or crushing nuts on stones to get at the meat of the nut.

We would have been living more moment-to-moment, constantly foraging for food. Hunting, after all, requires thought and planning. Eating meat requires preparation and most importantly, fire. Until man discovered fire, he was primarily vegetarian, living in what was the natural order of things. Vegetarian eating is a more natural way of eating, in addition to being healthier. It's a way that's in balance with the planet, and doesn't seek to dominate it and conquer it.

It must have felt unnatural at first, to eat animal flesh. After all, we're not so far removed from animals ourselves. Perhaps it even felt cannibalistic. There might not have been that much intellectual distinction between humans and other animals.

When humans were pure vegetarians, they were living in harmony with the earth and with the other creatures co-habiting the planet with them. Their closest animal relatives, apes, were vegetarians. Eating the products of the earth, like plants, grains and fruits that they could gather and eat would have seemed the natural order of things.

But necessity is the mother of invention. Prehistoric men who lived in frozen geographies, or who lived in an area that became devastated by fire, would have eaten anything to survive. Just like the soccer players whose plane crashed in the mountains of Chile, and were forced to eat the flesh of other players who died in the crash, earliest man at some point had to make the choice for survival, and that could have consuming meat for the first time and changing human history - and health - forever.

We can imagine that men first ate meat that had been charred or cooked by virtue of being caught in a natural forest fire.

They might have subsequently eaten raw meat, if necessary, but we can also imagine that our earliest digestive systems rebelled against eating raw meat.

Imagine having eaten raw foods and vegetables for eons, and all of a sudden, incorporating meat products into your system. You may have heard friends who were vegetarians tell stories of trying to eat meat and becoming violently ill afterwards.

Biologists will tell you we're really not designed to eat meat, but we adapted to it. However, in the timeline of human history, eating meat is a relatively recent evolutionary development.

How did our family traditions become centered around eating meat? Think about it. When we think of Thanksgiving, we think of turkey. If we eat pork, then New Year's celebrations often revolve around pork and sauerkraut. At Christian Easter, the traditional meal is ham. And in the summer, we wait for that first hamburger or steak on the grill.

How did that happen to a species that was designed to eat vegetables and fruits, nuts, berries and legumes?

We can imagine that eating meat was initially an opportunistic event, born of the need to survive. The taste of cooked meat, plus the sustained energy that came from eating high-fat meat products made primitive sense even to earliest man.

Initially, finding cooked animal meat, from a forest fire, would have been cause for celebration. It's something everyone in a clan would have participated in eating together. When man learned to hunt and moved to a hunting orientation, rather than a hunter-gatherer orientation, he would have done this in groups.

They would have had to hunt in teams, and killing an animal for food would have been a group effort. Hunting and killing an animal meant food not just for the individual, but for the clan, and would have been cause for celebration when the hunters brought the food home.

If they brought the animal back to the clan, it would have taken a group effort to skin the animal and tear or cut the meat from the carcass. Everyone would have participated in this, and subsequently, shared in the rewards of their work.

It's easy to see how, once we didn't have to hunt for meat, but could buy it, the need for gathering and celebration was deeply ingrained in our natures. We celebrate the seasons and life's events with family and friends, and because those early celebrations involved eating meat, that tradition has continued to modern times.