Archbishop Emeritus Desmond Tutu says he cannot keep quiet about the injustice of discrimination based on sexual orientation.

The 81-year-old retired Anglican bishop, who gained notoriety speaking out against apartheid in South Africa, appeared Wednesday in a 60-second video for the United Nation's Free & Equal campaign.

“I have to tell you: Cannot keep quiet when people are penalized for something about which they can do nothing,” Tutu said in the spot. “First, gender – when women are excluded just simply and solely because they are women.”

“But more perniciously, more ghastly is the fact that people are penalized, killed, all sorts of ghastly things happen to them simply and solely on the basis of their sexual orientation. I oppose such injustice with the same passion that I opposed apartheid.” (The video is embedded on this page. Visit our video library for more videos.)