Sonke Gender Justice has run a campaign aimed at involving men and boys in action against domestic and sexual violence since 2006.
Called the One Man Can campaign, it was launched after research in Johannesburg showed that many men questioned wanted to do more to end violence against women.
The survey found that although 41 percent of men thought the government was doing too much to end violence against women, 38 percent thought it was doing too little.
Some men hold deeply alarming attitudes towards women, sex and gender equality says Sonke's Dean Peacock.
But a growing number of men and boys are strongly opposed to this violence and feel that it has no place in a new, democratic South Africa.
They recognise that it is a fundamental violation of women's human rights, he says.
These men give voice to the reality that many men are themselves affected by domestic violence and rape.
They remind us that boys who live in homes where their fathers abuse their mothers are often terrified by their fathers and the violence they commit.
All men are affected when women they care about are raped or assaulted.
Peacock says the goal of the One Man Can campaign is not to point fingers but to appeal to all those who are worried about violence.
They may be men who have used violence in the past but who know it is wrong.
In South Africa we have a history which shows we can bring about fundamental change. We're appealing to that history, asking people again to be agents of change.