Phumzile Mlambo-Ngcuka is Under-Secretary-General and Executive Director of UN Women.

The #TimeIsNow for Solidarity and Sisterhood

Danai Gurira and Reese Witherspoon in conversation with UN-Women Executive Director Phumzile Mlambo-Ngcuka (centre) at the 2018 International Women’s Day commemoration © UN-Women/Ryan Brown

In the nineteenth century, people around the world fought and defeated slavery. In the twentieth century, the struggle against racism and colonialism awoke the world's conscience again. The great challenge of the twenty-first century is embodied in the struggle against sexism, gender-based violence and all forms of oppression of women.

The UN at 70 and the Ongoing Quest for Gender Equality

© UN Photo/ Loey Felipe

Thanks to the determined contribution and vision of pioneering women (and men) throughout its history, gender equality and women's human rights have always been central to the three pillars of the work of the United Nations: peace and security, development, and human rights.