Reclining on stage at the 26th COP summit in his native Glasgow, Alan Jope was at home both literally and spiritually. The Unilever chief executive had spent three years establishing himself as one of the corporate world’s most passionate climate and diversity advocates, vowing to accelerate his predecessor, Paul Polman’s, environmental, social and governance leadership. And with his company a principal partner at the biggest climate summit in history, the Scotsman’s efforts had reached their natural apogee. “We think there…