Russia, crippled by intense drought that has withered millions of acres of Russian wheat, moved today to ban exports of its grain. This is a fifth of the world’s market, and comes at a time when grain prices are already up 90%.

This dangerous mix of global warming (this is Russia’s worst heat wave since record-keeping started there 130 years back), the precariousness of chemical-industrial agriculture, and the fickleness of world trade flows got me thinking, once again: Is there a better way?