They need to be restrained. It is one thing to talk about a global community created by communications and transportation technologies, but it is quite another for individuals to act as citizens of a planet-wide society, and for corporations of any sort to act in the interests of anything but profit. And unless food production is put on a socially, ecologically, and economically sustainable footing, we can hardly claim to be tackling urgent global problems. The only thing corporations will ever tackle is more profit and higher dividends for their shareholders. It is not realistic to expect otherwise.
Industrialized agriculture promotes uniformity in food crops all over the planet.
Every broccoli variety offered in the seed catalogues in 1900 has now disappeared. As agrochemical companies absorb seed companies the trend towards concentration continues. National government and international organizations must work now to control population growth, and through regulation assure that we have enough to eat by maintaining bio-diversity. The term involves literally hundreds of components. How much diversity is necessary and how much is expendable.