I have not read the comments here, so I'll just jump in with a few thoughts. GMO is an important topic for all of us to educate ourselves on because it seems to be all profit oriented (engineered). As I recall, it was originally touted as Genetically Engineered (created by the soon to be infamous GE company---soon to be dropped from DOW stock listing after 109 years). Originally the concept of Genetic Engineering was sold to the public as necessary for the purpose of feeding the masses - without which, there surely would be world wide famine, due to pests and insects that were multiplying, regardless of all the chemical spraying in fields of mass producers. Perhaps the use of MODIFIED was ultimately decided by the manufacturers to be more user friendly. (Do any of you remember these origins as I do?) Initially, I just accepted that these foods were decidedly created with care and concern for public health. Duh!
Since then I've read that GMO's were developed into seeds 
to poison insects from destroying certain crops; however, poisonous residues from seeds of these crops are now showing up in the vegetables that humans consume...tiny fragments like Round Up and other popular, "friendly" poisons.
GMO's are not well accepted in EU or China because the people of EU are well educated about food and how food produces healthy and happier humans. Most in EU value their food sources, unlike U.S. citizens.
If GMO's were so good for mankind why did Monsanto manipulate/ negotiate a sale of their company to BAYER...a universally known and trusted manufacturer of HEALTH PRODUCTS?
Come on, people stop trusting Conglomerates. They only care about their profis - not our health and well being.
Tis true that selective breeding has been around for millenia. However, GMO or GE is clearly not the same. See? This is how CORPORATIONS get us to believe their lies and deceit--mix some ancient history into the "conspiracy". Now, most of the public has turned deaf ears to this entire topic....believing that it's been happening for success over hundreds of years. Selective breeding is how wolves became friendly, loyal pets. Not how sugar beet seeds incorporate poison to discourage worms that dig into the young, maturing beet.
My Grandma lived to 107 years and never ate processed or fast food. She left this planet 11/2015. How long will those of you who eat GMO foods live?
My anecdotal evidence has been more from the production side. I saw how "roundup-ready" soybeans flooded the market, pushing regular seed developers out in the late 1990s. Oddly enough, these "superior" beans actually produced 15-20% less yield, and cost three times as much to plant and maintain.
I believe, deep down that their supposed "can't feed civilization without it" benefits is at best marketing, and at worst, part of a plot to monopolize food. Either way, I have seen the "yield increase" (without which we would all die of starvation) that Monsanto hangs their hat on to not only be exaggerated, but a complete out and out lie.
Perhaps the following provides us with the definitive answer as to whether or not GMO crops are best for humanity...on YouTube.
Wow that's really long. I'll check it out and post the "cliff notes" version when I get the time.
Yes, but it explains everything...complexity requires complete understanding. Please post the short version - it will help, no doubt. And then there is the 2nd episode...lol