Sebastiao Salgado – master of monochrome, chronicler of the depths of human barbarity

Occasionally, we encounter an image that seems so ludicrously out of kilter with the modern world that we can only flounder in antiquity for appropriate descriptions. We see a black and white photograph that shows a swarm of tiny figures, ant-like in their relentless pursuit of some mysterious purpose around the edges of a dark, cavernous maw, and we say it’s biblical, epic, ancient.