Of all the insights that I have gained into coffee culture on the trail to Ethiopia before returning back to the whirlpool of London life, there is one softly spoken truth that endures. It is a universal truth that runs through the coffee trade and culture like a golden thread, connecting every stage of its complex supply chain from field to cup. It is a philosophy that cannot be fully expressed in books, research papers or from the good intentions of policy-makers. Its application cannot be taught out of a school textbook. Neither can it be bottled, packaged or commoditised in the interest of profit. It transcends all these things;…