"I think there's a very fundamental urge to create a safe space, a home; most animals have that impulse, and humans certainly do - with some exceptions, like nomadic people who perhaps don't feel the need to settle in quite that way. But most of us do want to have space, somewhere we feel secure and where we repeatedly return. Somewhere we can sleep without fear. And there's nothing wrong with that desire. It's completely understandable. It only becomes ugly when that creation of a safe space involves making an enclosure from which other people are kept out."