Kumi Naidoo is a world renowned activist and climate leader. Before going on to lead Greenpeace International then Amnesty International, Naidoo was a 15-year-old anti-apartheid activist in South Africa. The boycotts he organized led to him being a target of the Security Police. He fled South Africa and lived in exile in the UK.

As a climate activist, Naidoo has been arrested for scaling oil rigs, has negotiated with heads of state, and rubbed shoulders with the most powerful people at the World Economic Forum in Davos. Now he’s a visiting scholar at Stanford’s Center on Democracy, Development and the Rule of Law, where he’s focusing on how activism can win bigger and faster.