Where yes Monsanto was ONE of the manufacturers of agent orange. It was designed as a kill all herbicide. Monsanto used to have its hands in ALOT of chemical industry. They'er moving away from that industry. Roundup is one of the only chemical things they produce. They are heavily focused on Agriculture.
We need to face reality. The human population continues to grow and there is not enough food to sustain us. They are making crops produce more and more nutritious crops. In Drought ridden areas of the world they have implemented drought resistant crops that can thrive and feed the people.
In recent years cotton crops have been ravished by insects and plant diseases and Monsanto research is trying to make those plants more resistant.
Sure the insects that live off of those plants might not have another food source.
Humans or the bugs? I guess the real question is how messing the the natural balance of things will effect the worlds ecosystem in the long run? Will it be a constant battle for researchers to constantly overcome new famines? Will the world evolve so that affected insects and animals find other source of food.
All I know is that Monsanto is trying towards sustainability.