The largest known factual problem with GMO's is Monsanto's belligerence in enforcing patent ownership. It started with corn, which is open pollinated. If your cornfield is close to a field growing Monsanto gmo corn then it's almost 100 % your corn will be pollinated some by Monsanto's corn. They have genetic markers and if your corn is sampled Monsanto marker's show up. They (Monsanto) would rigidly enforce "patent violations" and sue the innocent farmer; Monsanto won some of the early cases to the detriment of the innocent farmer. A lot of the Monsanto GMO crops were merely herbicide resistance to their patented Roundup and dicamba herbicides. Which in my opinion was a dumb move because it promoted over use of the herbicides. Just like indiscriminate antibiotic overuse, weeds are and have developed resistence
okay i think your corn example needs clarification. corn is not open pollinatied in the spirit of actual open pollination. what i mean is it doesnt count if al the corn in your state is from the same 3 varietals which it is and there is no wild corn anymore whcih there isn't. the variation is very small in this case and easily deconstructed. the corn you are referring to resembles nothing of the corn aka maize that was here 300 years ago. we have homogenized corn more than like any other crop it's not even funny.
this is from the ny times:
"Within one generation, the new extra sugary varieties eclipsed old-fashioned sweet corn in the marketplace. Build a sweeter fruit or vegetable — by any means — and we will come. Today, most of the fresh corn in our supermarkets is extra-sweet. The kernels are either white, pale yellow, or a combination of the two. The sweetest varieties approach 40 percent sugar, bringing new meaning to the words “candy corn.” Only a handful of farmers in the United States specialize in multicolored Indian corn, and it is generally sold for seasonal decorations, not food."
add to this the following from same article:
"When European colonists first arrived in North America, they came upon what they called “Indian corn.” John Winthrop Jr., governor of the colony of Connecticut in the mid-1600s, observed that American Indians grew “corne with great variety of colours,” citing “red, yellow, blew, olive colour, and greenish, and some very black and some of intermediate degrees.” A few centuries later, we would learn that black, red and blue corn is rich in anthocyanins. Anthocyanins have the potential to fight cancer, calm inflammation, lower cholesterol and blood pressure, protect the aging brain, and reduce the risk of obesity, diabetes and cardiovascular disease"
now sprinkle in the food is many many times less nutrient dense and lacking phytonutirents because of commercial selecting it is not even funn. this nutrition lacking in our food has a correlation to the health problems of modern society. studies have shown this correlation directy, tho it is only a correltationat this point.
it doesn't take much or long to change a plant from one thing into something completelty different, and we should proceed slowly and with caution, not with a capitalist ferver