Behind the scenes on the HTDG tour

To mark the release of How to do good - a collection of essays from celebrities and thought leaders on building a better world - Philanthropy Age launched a speaking tour to spur discussion and debate around how philanthropy can help address some of the world's biggest challenges. Kicking off a seven-city series of events, we've touched down in Oslo, Stockholm and The Hague so far to talk social change, hope and the willingness to do good. Here are some highlights: