In this post on the Huffington Post blog, Johann Hari argues that the current disease threat to bananas is a "parable for our times." Basically, he argues that when corporations are not constrained by government regulations, they trample over people and the environment in the pursuit of profit.
I see a slightly more nuanced "parable" in the case of the banana. It seems to me that when there is a minimum of diversity in the actors controlling an important step in a food commodity chain (in this case, the big three banana companies, but it could also be the fast food restaurants that want standardized tomatoes), it tends to result in decreasing biological diversity (monoculture). What do you think?
We might consider the alternative: what kinds of food commodity chains tend to lead to greater biological diversity?