I think everyone accepting "some" of the blame is probably a good start.
I know that the U.S. has messed up big time over the years but it has become fashionable to bash us rather than figure out some answers.

Does anyone doubt that the current oil prices and the hostility of the nations containing the largest oil reserves are driving the push for eco-fuels? Where is the harsh words for the nations of OPEC that are causing some of the problem? It's not like tilling, sewing, and harvesting are done with beasts of burden anymore (aside from in Amish country). It all takes fuel! Then the transport of the grain from the farm to where it's needed again takes fuel. With rising fuel costs come rising food costs. It's not a one sided deal!

We are also using a fraction of the corn crop to develop biodegradable plastics to counter the problems caused by pollution.

Some of this crisis is also caused by the mistrust of the genetically altered crops which grow more abundantly (not taking sides here but there are millions of tons of grain going to waste because no-one will eat them).

The only way to stop the starvation in Sudan, Somalia and the Congo is to force the fighting to stop but no-one wants to do it and if the U.S. did we'd be condemned! The only way to get the farms of Zimbabwe up and running would be to get Mugabe out of power and get real farmers working the land. Who's going to do that?

I don't even know what to suggest for the rice crop failure!