"Safety lies in catering to the in-group. We are not all brave. All I would ask of writers who find it hard to question the universal validity of their personal opinions and affiliations is that they consider this: Every group we belong to - by gender, sex, race, religion, age - is an in-group, surrounded by an immense out-group, living next door and all over the world, who will be alive as far into the future as humanity has a future. That out-group is called other people. It is for them that we write."