Rebecca Peters

Rebecca Peters served as Director of the International Action Network on Small Arms (IANSA) from 2002 to 2010. She was still listed on the IANSA board of directors as of April 2012.
As chair of the (Australian) National Coalition for Gun Control at the time of the Port Arthur massacre in 1996, Peters played a key role in the introduction of stricter gun control in Australia, an area in which she remains active today.
The Umut Foundation says:

Rebecca Peters was Chair of the National Coalition for Gun Control, which campaigned to tighten Australia's gun laws in the 1990s. Her research and advocacy helped bring about sweeping changes, including a move towards uniform gun laws across the eight states ( the laws are still not entirely uniform in 2011 ), a ban on semiautomatic rifles and shotguns, and a year-long buyback that destroyed nearly 700,000 weapons.

Peters received the 1996 Australian Human Rights Medal, for "her contribution to researching, educating and lobbying for gun law reforms in Australia".
Prior to her work with IANSA, Peters worked for the Open Society Institute, a private foundation funded by George Soros.

The most expensive kind of violence, is gun violence.

She has been criticized by the National Rifle Association in the United States, which said that Peters "is the voice and face of hatred of gun owners and Second Amendment freedoms."