The Dignity of Struggle: Sebastião Salgado's TRABALHADORES (Workers) exhibition, at Casa Firjan, Rio de Janeiro

What does the past reveal to us about the future of work?

There's something magical about stumbling upon extraordinary art while on vacation. Here I am in Rio de Janeiro during what locals call winter, though the temperatures feel decidedly like summer, and I find myself face-to-face with some of the most powerful photographs ever captured. At Casa Firjan, Sebastião Salgado's exhibition on workers has left me …