Bosnian photographer Ziyah Gafic grew up in Sarajevo during the war. In this powerful Q&A, he explains why he obsessively takes pictures of rusty watches, broken glasses and old combs.

We asked an international group of 12 artists, designers, photographers and activists to provide one image that encapsulates what inequality means to them — and to explain their selection. The results are stunning and thought-provoking. Warning: some of them might make you cry.