"Today, hybrid seed production is predominant in agriculture and home gardening, and is one of the main contributing factors to the dramatic rise in agricultural output during the last half of the 20th century. In the US, the commercial market was launched in the 1920s, with the first hybrid maize. All of the hybrid seeds planted by the farmer will be the same hybrid while the seeds from the hybrids planted will not consistently have the desired characteristics. This is why hybrid seed is constantly repurchased by growers for each planting season." http://en.wikipedia.org/wiki/Hybrid_seed
This is not necessarily true in every case. pvnick mentioned Golden Rice. The Co-inventor of the genetically engineered, vitamin-A-rich strain of rice Potrykus has spearheaded an effort to have golden rice distributed for free to poor farmers. This required several companies which had intellectual property rights to the results of Beyer's research to license it for free. In fact, Monsanto was one of the first companies to grant free licenses. If the substinence farmer doesn't make more than $10,000 per year, he is freed from paying any royalities. The farmers are even permitted to keep and replant the seeds.
This is in the specific case of Golden Rice. Maybe somebody can jump in and tell a horrific Monsanto story.
Of course, even GM crops can not protect from all causes of crop failure. But blaming them on every cause of failure is wrong.
It's analogous to US students getting into a pickle by accepting large student loans and then finding no jobs in their field. But if they don't take the risk they may lose to those who took the risk. They'd almost all be better off if the student loans weren't available.
http://grist.org/news/supreme-court-hands-a-big-win-to-monsa...
[1] http://www.monsanto.com/newsviews/Pages/why-does-monsanto-su...
Yes it means you get to pay more (in some cases a lot more) for your bread. It also means that farmers make more money and enable them to sell their wheat _now_ when they need the money and not after they have been foreclosed and it puts a price floor on the market for wheat, insuring that the crops we need to prevent starvation will not rot on the fields.
Potential, yes; but not with massive financial interests behind it. In a world where shiploads of wheat are held back in order to game the wheat market, things need to change before GMOs can cure 3rd world hunger.
I've read that GMOs have to be bought anew for every season because the harvested crops can't be used as seeds. Is that actually true?