Whenever natural disasters strike, there follows an outpouring of humanity. We have a deeply evolved psychological need to help people who are suffering, especially when heart-rending images enter our home. The tear-streaked face of an orphaned child, or the look of desperation in a father's eyes as he searches through rubble for his family touch our hearts. We are shaped by Darwinian natural selection to be empathetic. .....
http://newsweek.washingtonpost.com/onfaith/panelists/elisabeth_cornwell/2010/01/helping_haiti_because_it_makes_us_feel_good.htmlLinks to the groups in the article
http://givingaid.richarddawkins.net/http://www.atheistvolunteers.org/Austin