Peter Singer is a moral philosopher, ethicist and writer. He is a Professor of Bioethics at Princeton University and the author of " Famine, Affluence and Morality," and " The Life You Can Save", which makes the argument for the moral imperative to personally take action end poverty.
Archbishop Desmond Tutu is a South African human rights activist and retired Anglican bishop who rose to worldwide fame in the 1980's for his opposition to apartheid for which he received the Nobel Peace Prize in 1984.
Peter Bakvis is director of the Washington office of the International Confederation of Free Trade Unions, also known as Global Unions and the Associated International Trade Secretariats. Collectively, these organizations represent over 100 million workers world-wide.
F.W. de Klerk
Frederik Willem de Klerk was the seventh and last State President of apartheid-era South Africa. He is best known for engineering the end and negotiating the transition to a multi-racial democracy in South Africa. He received the 1993 Nobel Peace Prize for his role in ending apartheid.
Carlos Filipe Ximenes Belo
Carlos Filipe Ximenes Belo is an East Timorese Roman Catholic Bishop who received the 1996 Nobel Peace Prize, along with Jose Ramos-Horta, for "work towards a just and peacful solution to the conflict in East Timor."
Mairead Corrigan Maguire is a Northern Irish peace activist. She co-founded with Betty Williams the Community of Peace People, an organisation dedicated to a peaceful resolution of the conflict in Northern Ireland. In 1976, she was awarded, with Williams, the Nobel Peace Prize for this work.
Wangari Muta Maathai (1940-2011) was a Kenyan environmental and political activist. Maathai founded the Green Belt Movement that focused on planting trees, conservation and women's rights. In 2004 she became the first African woman to receive the Nobel Peace Prize for "her contributions to sustainable development, democracy and peace."
Dean Baker is an American economist, who co-directs the Washington-based Center for Economic and Policy Research. A frequent contributor to the New York Times, Huffington Post, CNN, and other media outlets, his economic reporting includes commentary on the financial transaction tax.
Shirin Ebadi is an Iranian lawyer, former judge and human rights activist. She founded the Defenders of Human Rights Center in Iran. Her work has focused particularly on the rights of women, children and refugees. Shirin Ebadi received the Nobel Peace Prize in 2003, the first Iranian ever to receive the prize.
Geoffrey Bakhuya works as a community organizer and child protection specialist for Médecins Sans Frontières, visiting clients who are gravely ill with HIV and making sure they get their medications. His beat is Kibera, one of the worst slums in the world.