Go and see "Salt of the Earth" right now, seriously.
I've seen the works of Sebastião Salgado before, but the backstories he tells, the cinematography, the tactful direction by Wim Wenders — all leave an even bigger impression. I thought I'd faint right in the auditorium, but went home with an imperative impulse to draw. 

So, here's what I got.

All the textures used are leather.

Here's the process.