Chapter 13 focuses on the social psychology which includes stereotypes, racism, and group working. According to the article, people tend to give more to victims of natural disasters than victims of man-made catastrophe like wars, and political problems according to new research by psychologists. It happens because most people have a kind of stereotype that even though they know most innocent people get damage from people who pull the trigger the artificial disaster they have less sympathy to those people. For instance, people give more to a drought victim than a war victim because people suspect the latter may be partly to blame for their plight, the authors say. It could explain why the 2004 Indian Ocean tsunami sparked a huge response but the Darfur appeal received less. The study was published in the European Journal of Social Psychology. Brendan Paddy of the Disasters Emergency Committee (DEC), a UK body that co-ordinates aid appeals said that these conclusions are come from our experience. From my experience, I donated some money to Haiti tsunami disaster. However, I did not donate some money to children and victims of Afghanistan war which is an artificial disaster. Check out the BBC article which includes more detail and interesting experiments.