Financier George Soros has announced he will donate 100 million dollars to Human Rights Watch, HRW, over the next 10 years. The gift from the 80-year old investor and philanthropist is the largest the billionaire has made to a non-governmental organisation, HRW said. It is given under the condition that human rights group would have to raise another 100 million dollars.HRW, which is based in New York, currently has a staff of almost 300 and a presence in nearly 90 countries. In October, Forbes Magazine estimated Mr Soros's fortune at 14b billion dollars.