As Bill and Melinda Gates said in their 2014 Annual Letter earlier this month “By almost any measure, the world is better than it has ever been. People are living longer, healthier lives. Many nations that were aid recipients are now self-sufficient.”  Yet despite this fact, you’ve probably heard a lot of myths that paint a more depressing picture, especially around food and agriculture. “African countries can’t grow enough food to feed themselves” or “All farmers in Africa are poor”....