Mentality

Human beings are a part of the animal kingdom, not apart from it. The separation of "us" and "them" creates a false picture and is responsible for much suffering. It is part of the in-group/out-group mentality that leads to human oppression of the weak by the strong as in ethic, religious, political, and social conflicts.
--Marc Bekoff, Animals Matter: A Biologist Explains Why We Should Treat Animals with Compassion and Respect