‘Tis the giving season, and your inbox and mailbox are full of requests to donate to a variety of causes. Like a trip to the mall, it can all be overwhelming. Should you give to one charity or spread your giving among various nonprofit organizations? Should you give even if you can barely afford your rent? And how do you know which charities spend their money—your money—wisely? Northeastern Global News talked to professor Patricia Illingworth, a philosopher and author of “Giving Now: Accelerating Human Rights for All,” about how to give—and to whom.