system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: the problem with Monsanto and its rise to becoming such a prominent monopoly.
gpt
Farmers like to plant crops year after year and like to fight off the insects that attack their crops.  Crops normally produce seeds that can be used to grow crops next year.  

Monsanto sells special seeds that can be activated to be resistant to insects. All you have to do is buy new seeds every years since these crops do not produce useful seeds. You also have to buy the chemical to activate the seeds. 

It is much more complicated than that, but the idea is that once they have you as a customer you can never leave. Every time you try to leave, they pull you back again.