Soybeans have been grown in China for at least the last 5,000 years thanks to their nitrogen-fixing properties. In more recent times soy has become a major source of food for billions of people and livestock. Soy is high in protein and essential amino acids and is processed into many different products such as tofu, tempeh, miso, textured vegetable protein and soy sauce.
Soy is also one of the more genetically engineered and commercially controlled crops in history. The Monsanto corporation provides the seeds that grow 90 percent of the total U.S. soybean crop, leaving the industry's fields vulnerable to disease.