From Wikipedia:
A Sudanese refugee enslaved at the age of nine. He was enslaved when his neighbor asked Simon to accompany him on a trip. Simon was given as a gift to the neighbor's family. Having escaped slavery and emigrated to the United States, he travels the country addressing audiences which range from the United Nations to middle school students. His speeches focus on education and the anti-slavery movement.
http://en.wikipedia.org/wiki/Simon_Deng
I don't want to write a lot about Mr Deng, as I neither know him personally nor much about him. But I do want to point out an article of his and a speech.
An article that appeared in several Jewish magazines:
"Where is Desmond Tutu when my people in Sudan call out for freedom?"
"Late last month, I went to hear Bishop Desmond Tutu speak at Boston's Old South Church at a conference on "Israel Apartheid." Tutu is a well respected man of God. He brought reconciliation between blacks and whites in South Africa. That he would lead a conference that damns the Jewish state is very disturbing to me."
...
http://www.aish.com/jewishissues/israeldiary/Disappearance_of_Bishop_Tutu.asp
Speech before the International Humanist and Ethical Union:
...
I thank you for giving me this opportunity to address you, and not only or primarily on my own behalf, but far more importantly on behalf of my people, the Southern Sudanese victims of Islamization, Arabization and enslavement at the hands of the tiny Arab minority in my country. Through my presence here you have given voice to millions of voiceless victims; you have made the invisible visible; you have helped me break the silence that has surrounded the destruction of my people.
My name is Simon Aban Deng. I am from Sudan. I am a Shiluk by tribe. I am a Christian by religion. I belong to a people who have been subjected to mass murder, slavery, systematic rape, religious persecution, enforced starvation, dislocation, exile. We are the victims of genocide, both physical and cultural. We have been targeted for annihilation as human beings and as members of a culture. These miseries did not fall upon us from the sky; we have been and remain the victims of the radical jihadist regime in Khartoum.
...
While the life of a slave is like hell, there is no shame in being a slave; it is not a choice. There is only shame in being a "master." If any one is to feel shame for the suffering of the people of the Sudan who have lost 3.5 million lives at the hands of a barbarous regime, it is the radical Muslims in Khartoum and their Islamist allies throughout Sudan and across the whole of the Islamic world.
...
I direct these last words principally to the United Nations. Do you stand for all human rights? Do you stand for all human liberties? Do you care about the dignity of all of the people of the world, including those branded by jihadists as infidels? The questions I have asked are repeated every single day by millions of black Sudanese. Can you answer me?
The failure of the United Nations to guarantee the basic rights of the slaves of Sudan and other black African "infidels" is shameful beyond my ability to express.
http://www.iheu.org/node/1539
When Africa was de-colonised and African countries got their independence, why were the Arabs allowed to keep their empire? I wonder.