Monsanto is specialized in biotechnology and produces genetically engineered seeds. As they were pioneers in this area, they took advantage in the mid 90s genetically altered seeds' fever and patented all the modifications they had introduced. One of the main characteristics of these seeds is that they are not useful from one harvest to the next, which forces farmers to buy new seeds every year. To maintain their monopoly they firstly patented all their genetic modifications; then, they bought the most important seed companies in the U.S. 'As a result, two firms, Monsanto and Pioneer ( purchased by DuPont), now dominate the U.S. seed business' ('Monsanto: The Bad Seed--Rachel's Environment & Health Weekly', Organic Consumers Association, http://www.organicconsumers.org). One of their allies was the U.S. government, which promoted the use of genetically modified seeds and allowed the sold of genetically modified food without labeling it as modified.
Cases like the Monsanto Canada Inc. vs.