I appreciate all the comments. There is always a question of what is a "free" market. Government plays an important role in enforcing contracts and trying to preserve private property. And as some people have pointed out here, government subsidizes wheat, keeps out competition, and so on. Yet in many cities with very different roles for government, bread is still plentiful. What the poem tries to get at is the fundamental principal of emergence that makes bread plentiful across diverse political environments. The most important "free" part of those markets is allowing prices to adjust. Governments that play with prices (Venezuela is the tragic example today) can prevent the supply of bread from emerging.

For those who want to go deeper into these ideas there is an annotated version of the poem here: http://wonderfulloaf.org/poem and a long list of essays, talks, and interviews on the ideas in the poem, here: http://wonderfulloaf.org/resources