We, viewing the pictures, are complicit. As consumers of images we bear witness through them. Or we’re voyeurs. In either case we complete a transaction that we instigated, in that a photograph is made hoping someone will look at it. It’s a message tossed into the ocean of time, and how we read that message, whether indifferently or with compassion, can have moral dimensions.

Oliviero Toscani’s “Kissing Nun,” taken for Benetton, shown in the “Controversies” exhibition.

One regime’s moral authority is another’s tyranny.

This was a profound violation for these women. Making the pictures turned Mr. Garanger entirely against French rule. He registered his opposition in these official portraits, through the humanity of his subjects, whose anger, which the pictures make perfectly obvious, conveyed both their oppression and resistance.