I've always been a vegetable-sceptic, too. When I was younger, I was intensely interested in 'living off the land', and after reading lots of books and experimenting, I realized that if you couldn't hunt or fish, you'd soon die here in the Northeast woods. Most edible vegetation here is of the seasonal green-leafy variety, and usually very bitter, and any most pre-historic peoples would likely choose fat/meat over bitter greens if given a choice. Vegetation was probably 'starvation fodder' to be eaten only as a last resort. I don't know where the fathers of broccoli, tomatoes, and cauliflour came from, but I've never seen any growing here in the wild.