The demonization of Islam and immigrants shows that perception of difference remains one of our biggest problems, and maybe always will be for a species that began in small groups competing with other groups for resources. These apparently competing forces for sameness and difference sometimes even seem to be mutually reinforcing. The homogenizing force of globalization tends to make many people feel they are on the losing side, economically and culturally, and it is they who are most easily turned against those "others" who are demonized by demagogues.