The argument that "100 million people could be fed using land that is currently used to feed cattle" is not that simple. In theory it makes sense, but at this very moment countless usable fields lie fallow by request of the government. The government actually pays farmers not to plant any crops in order to prevent a surplus in the market: supply and demand remains stable and the economy with it. Furthermore, if the farmer does plant and harvest, he often takes only the grade A produce and discards the rest. It is good for business, but bad for the millions of starving people; Just another maddening irony in our world.