In the early 1980s when I was a schoolboy, my father, Brian Hartley, worked for Oxfam during a famine in Uganda’s Kara-moja. Like Dad, the other Oxfam people I remember in East Africa were earnest agriculturalists or engineers who had been overseas most of their lives. Some of them were religious or socialist, but they all had the technical skills to help local farmers rebuild their lives after wars or droughts.