Nigeria, April 14 -- I was recently invited to give a lecture with the above title by Professor Jide Oladipo, the erudite Dean of the Faculty of Social Sciences at Nile University, Abuja to mark their annual lecture series for the year. It was a great honour and an interaction I greatly enjoyed, having given several lectures on similar platforms at that location and elsewhere. Nile University has a special place in my heart for many reasons, and I was lucky to also meet Professor Dilli Dogo, the Vice Chancellor and Professor of Medicine, after my lecture. The lecture itself was well attended as the hall was packed to the brim. It is always a great pleasure to speak with young people and learn from them. The students came from diverse acad...