Nigeria, Feb. 5 -- Recently, I had the opportunity to travel to the United States for professional engagements related to my work in climate change. While there, I also took some time off to visit friends; Nigerians who had left home in pursuit of excellence. Some are affiliated with top global universities and on the path to becoming leading scholars. Others are pushing the frontiers of medical research at world-class institutions. Many are working for top corporations, excelling in their industries and proving their worth in environments where merit is recognised and rewarded. As I spent time with them, I noticed something striking. Their success was not just about hard work and intelligence, which are attributes many Nigerians possess....