I'll take a try at that.
Evolution is occurring all the time, so “genetically modified” is actually a wrong term. If you look at dogs that started off as wolves, and now we can go from a Chihuahua to a Great Dane—cattle is another one—we have been separating breeds for eons. In so doing, we are genetically modifying by our selection. It's what I will call the “old” biotechnology, if you like.
I think it's actually a misnomer. Almost every bit of food, unless we're eating it wild, is genetically modified by man. We used to call it physiological cattle yield—Holstein versus Jersey was how we did it. But they're all because of genetic modifications selected by how the animals perform in some cases. That's always been going on.