Infosys non-executive chairman Nandan Nilekani and his wife Rohini have joined the growing list of billionaires who have committed to give away at least half of their wealth to philanthropic causes through The Giving Pledge campaign, founded by Bill Gates and Warren Buffett. They join Wipro’s Azim Premji, Biocon’s Kiran Mazumdar-Shaw and P N C Menon of the Sobha Group in this list. This is good news and will encourage others to donate generously to help rid the world of its many ills.