system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: What is the march against monsanto? What is monsanto?
gpt
Monsanto is a huge corporation that, among other things, has genetically modified strains of food crops to be immune to an herbicide they produce. This means you can purchase seeds from Monsanto, then spray your field with the herbicide you bought from Monsanto and all the weeds die while your crops live. This significantly increases the yield from a given field and more than offsets the more expensive seeds and herbicide.

However, this means that people who don't buy from Monsanto have a hard time competing against those who do. So people resort to scare tactics, claiming that GMO foods are dangerous or that Monsanto wants to crush small farmers and eat their babies. They also try to grow Monsanto's special seeds without purchasing them from Monsanto, violating their contract or just stealing them outright. Monsanto sues them and often wins, a fact that people again use as justification for the "big evil corporation".