Perhaps we can think about the phrase “black lives matter.” What is implied by this statement, a statement that should be obviously true, but apparently is not? If black lives do not matter, then they are not really regarded as lives, since a life is supposed to matter. So what we see is that some lives matter more than others, that some lives matter so much that they need to be protected at all costs, and that other lives matter less, or not at all. And when that becomes the situation, then the lives that do not matter so much, or do not matter at all, can be killed or lost, can be exposed to conditions of destitution, and there is no concern, or even worse, that is regarded as the way it is supposed to be. The callous killing of Tamir Rice and the abandonment of his body on the street is an astonishing example of the police murdering someone considered disposable and fundamentally ungrievable.
But, of course, what we are also seeing in the recent and continuing assemblies, rallies and vigils is an open mourning for those whose lives were cut short and without cause, brutally extinguished. The practices of public mourning and political demonstration converge: when lives are considered ungrievable, to grieve them openly is protest. So when people assemble in the street, arrive at rallies or vigils, demonstrate with the aim of opposing this form of racist violence, they are “speaking back” to this mode of address, insisting on what should be obvious but is not, namely, that these lost lives are unacceptable losses.