The sometimes murky business of philanthropy - giving away large sums of money - has become a hot topic, as some of the world's most high profile donors and institutions have become mired in controversy.The most obvious example has been over donations to the arts and culture organisations made by some members of the Sackler family. Some of the family wealth was founded on the US company Purdue Pharma, the maker of an opiod painkiller. But it is not just the Sackler riches that have come under attack - sponsorship of museums and art exhibitions by oil companies have also been criticised recently.

Ed Butler and guests discuss the ethics of giving. How should donors decide where to put their money and how do museums and arts organisations decide which money they should accept?

(Photo: Photographer Nan Goldin leads a demonstration at the Harvard Art Museums in Cambridge, Massachusetts, to protest the benefactor of the Sackler Art Museum (Credit: Erin Clark/Boston Globe/Getty Images) Show less