Author and scholar Karen Armstrong talks about how the Abrahamic religions -- Islam, Judaism, Christianity -- have been diverted from the moral purpose they share to foster compassion. But Armstrong has seen a yearning to change this fact. People want to be religious, she says; we should act to help make religion a force for harmony. Click below to see her Feburary 2008 talk at the annual TED conference. The talk is about 20 minutes long.