... okay... I can't sit this out.
Very nearly EVERYTHING we eat has been modified from its natural form by thousands of years of agricultural manipulation by humans. Do a quick Google and you'll see that corn, for example, looks absolutely nothing like its originating natural counterpart. You can say the same for apples, wheat, potatoes, cows, pigs, citruses, rice, berries, lettuces... I could go on forever. Without that manipulation, and the accompanying agricultural modification of our environment, we wouldn't be able feed everyone.
I find myself perennially annoyed, however, when my organic-loving friends cite fruits and vegetables that are the product of age-old selective breeding as "GMOs" (with a self-righteous sneer, I might add). What's more, in many cases, there's nothing inherently wrong with genetic modification. Rather, it's how that modification is agriculturally deployed that can make it problematic (eg: making herbicide and pesticide resistant crops so that we can deliberately overuse these environmentally-harsh chemical sprays).
So readers, when you're at a BBQ next week and you bite into a delicious cob of perfectly-cooked, organically-farmed sweet-corn, remember: what you're eating never existed in "nature".
P.S. - And I would be remiss to complete this rant without recommending Maggie Koerth-Baker's excellent article on the Lenape potato.