I grew up a global orphan, and I call London my home today. The simple reason I chose to live there was this: first and foremost, I’d never met a city that let a mutt like me be myself. And yet, over the last several years or so, gradually, almost imperceptibly at first, the tenor of my city has changed. The convulsions of violence that have wracked London and other British cities seem to have exploded overnight, but I’d bet those of us living here know: that fuse has been long burning.