It's not a question of good guys and bad guys. The whole system has to change, and there's a huge opportunity for reinvention. Facing the implications of what sustainability requires is no easy task, but we can't avoid it. In the twentieth century, we have been able to feed people by bringing more acreage into production and by increasing productivity through fertilizers, pesticides, and irrigation. But current agricultural practice isn't sustainable.
Most arable land is already under cultivation.
Attempts to create new farmland are causing severe ecological damage. So in the best case, we have the same amount of land to work with and billions more people to feed. It comes down to resource productivity. We have to get significantly more yield from every acre of land just to maintain current levels of poverty and malnutrition. This is only part of the story.