One passage from Nelson Mandela's writing that I have seen quoted frequently since his death is:

But then I slowly saw that not only was I not free, but my brothers and sisters were not free. I saw that it was not just my freedom that was curtailed, but the freedom of everyone who looked like I did. That is when I joined the African National Congress, and that is when the hunger for my own freedom became the greater hunger for the freedom of my people. It was this desire for the freedom of my people to live their lives with dignity and self-respect that animated my life, that transformed a frightened young man into a bold one, that drove a law-abiding attorney to become a criminal, that turned a family-loving husband into a man without a home, that forced a life-loving man to live like a monk. I am no more virtuous or self-sacrificing than the next man, but I found that I could not even enjoy the poor and limited freedoms I was allowed when I knew my people were not free. Freedom is indivisible; the chains on any one of my people were the chains on all of them, the chains on all of my people were the chains on me.

This rang a bell with me: Eugene Victor Debs, upon being sentenced to prison for anti-War work:

“Your Honor, years ago I recognized my kinship with all living beings, and I made up my mind that I was not one bit better than the meanest on earth. I said then, and I say now, that while there is a lower class, I am in it, and while there is a criminal element I am of it, and while there is a soul in prison, I am not free.”

Of course, we can honor Mandela, but Debs remains a footnote in American history, because socialism.