Why are countries that are rich in natural resources so often poor and war-torn? You’ve probably heard of blood diamonds, but what about blood vanilla, blood microchips, or blood chocolate? How are rebels and terrorists funding themselves with watermelons and wheat? We crisscross the globe from Papua New Guinea to Madagascar to find out.     ----   Power Corrupts is written and narrated by Brian Klaas. The executive producer and sound editor is George McDonagh.