Question: Who is the Hungarian-American investor, business magnate, philanthropist, and author who founded the international grant-making network that financially supports civil society groups around the world?

full_context: Document 1: Open Society Foundations: Open Society Foundations (OSF), formerly the Open Society Institute, is an international grantmaking network founded by business magnate George Soros. Open Society Foundations financially support civil society groups around the world, with a stated aim of advancing justice, education, public health and independent media.
Document 2: Carlos Slim: Carlos Slim Helú (] ; born January 28, 1940) is a Mexican business magnate, investor, and philanthropist. From 2010 to 2013, Slim was ranked as the richest person in the world. He derived his fortune from his extensive holdings in a considerable number of Mexican companies through his conglomerate, Grupo Carso.
Document 3: Open Society Foundation for South Africa: The Open Society Foundation for South Africa (OSF-SA) is a South African non-profit grant-making organisation that supports the civil society sector. Its mission is to "promote the values, institutions and practices of an open, non-racial and non-sexist, democratic civil society." The foundation was established by George Soros in 1993, just prior to the dismatling of apartheid and South Africa's transition to democracy.
Document 4: Warren Buffett: Warren Edward Buffett ( ; born August 30, 1930) is an American business magnate, investor, and philanthropist. Buffett serves as the Chief Executive Officer and Chairman of Berkshire Hathaway. He is considered by some to be one of the most successful investors in the world, and as of August 2017 is the second wealthiest person in the United States, and the fourth wealthiest in the world, with a total net worth of $76.9 billion.
Document 5: Christopher Stone (criminal justice expert): Christopher Stone, an American criminal justice expert, is the President of the Open Society Foundations, the global philanthropies of George Soros. Prior to assuming this position in July 2012, he served as the Guggenheim Professor of the Practice of Criminal Justice at the Harvard Kennedy School from 2005-2012. While at Harvard University, Stone also served as the faculty chair of the Program in Criminal Justice Policy and Management and as the faculty director of the Hauser Center for Nonprofit Organizations. His work at Harvard included research on justice reform in China and Turkey, the development of performance indicators for the justice sector in developing countries, and research on the establishment of the International Criminal Court.
Document 6: Human Rights Foundation: The Human Rights Foundation (HRF) is a non-profit organization that promotes and protects human rights globally, with a focus on closed societies. HRF organizes the Oslo Freedom Forum. The Human Rights Foundation was founded in 2005 by Thor Halvorssen Mendoza, a Venezuelan film producer and human rights advocate. The foundation's head office is in New York City.
Document 7: George Soros: George Soros ( or ; Hungarian: "Soros György" , ] ; born György Schwartz, August 12, 1930) is a Hungarian-American investor, business magnate, philanthropist, and author. Soros is one of the world's most successful investors. As of May 2017, he had a net worth of $25.2 billion, ranking among the 30 richest people in the world.
Document 8: Nicholas Schorsch: Nicholas Sloan “Nick” Schorsch (born March 2, 1961) is an American entrepreneur, investor and philanthropist. Schorsch is the Chairman, CEO, and co-founder of the investment services firm American Realty Capital. He is often characterized as a pioneer in the alternative investment sector of the financial services industry, particularly due to his influence on the commercial real estate investment space. He has received a number of honors and public recognition for his impact on the industry, including the Ernst & Young Entrepreneur of the Year Award in 2003 and the Ernst & Young Entrepreneur of the Year Lifetime Achievement Award in 2011. He is also regarded as one of the principal figures contributing to the increased appeal and accessibility of commercial real estate investments to individual investors.
Document 9: Paul Soros: Paul Soros (Hungarian: "Soros Pál" ; June 5, 1926 – June 15, 2013) was a Hungarian-born American mechanical engineer, inventor, businessman and philanthropist. Soros founded Soros Associates, which designs and develops bulk handling and port facilities. Soros Associates currently operates in ninety-one countries worldwide, as of 2013. Paul Soros was the older brother of George Soros, a successful businessman and financier.
Document 10: Bill &amp; Melinda Gates Foundation: Bill & Melinda Gates Foundation (BMGF), also known as the Gates Foundation, is a private foundation founded by Bill and Melinda Gates. It was launched in 2000 and is said to be the largest transparently operated private foundation in the world. The primary aims of the foundation are, globally, to enhance healthcare and reduce extreme poverty, and in America, to expand educational opportunities and access to information technology.
Document 11: Open Society Archives: OSA Archivum (abbreviated as OSA, short for Open Society Archives at the Central European University) is an archival repository and laboratory that aims to explore new ways of assessing, contextualizing, presenting, and making use of archival documents both in a professional and a consciously activist way. It was founded by George Soros in 1995.
Document 12: Oslo Freedom Forum: Oslo Freedom Forum (OFF) is a series of global conferences run by the New York-based non-profit Human Rights Foundation under the slogan “Challenging Power.” OFF was founded in 2009 as a one-time event and has taken place annually ever since. One of the key objectives of the conferences is to bring together notable people, including former heads of state, winners of the Nobel Peace Prize, prisoners of conscience, as well as of other public figures in order to network and exchange ideas about human rights and exposing dictatorships.
Document 13: Robert Kuok: Robert Kuok Hock Nien (; born 6 October 1923), is a Malaysian Chinese business magnate and investor. According to "Forbes", his net worth is estimated at $12.2 billion on July 2017, making him the richest person in Malaysia and second richest in Southeast Asia after Dhanin Chearavanont of Thailand, according to Forbes List of World Billionaires 2013 which Robert Kuok was placed 76th. As of December 2012, according to the Bloomberg Billionaires Index, Kuok has an estimated net worth of $17.3 billion, making him the 40th richest person in the world.
Document 14: Li Ka-shing: Sir Ka-shing Li, GBM, KBE, JP (born 29 July 1928 in Chaozhou, China) is a Hong Kong business magnate, investor, and philanthropist. As of September 2017, Li is one of the wealthiest people in Asia, with an estimated net worth of US$34.4 billion. He is currently the chairman of the board for CK Hutchison Holdings; through it, he is the world's leading port investor, developer, and operator, and the largest health and beauty retailer in Asia and Europe.
Document 15: Michael Bloomberg: Michael Rubens "Mike" Bloomberg (born February 14, 1942) is an American businessman, author, politician, and philanthropist. His net worth is estimated at US$ 53.4 billion, as of July 2017, ranking him as the 6th richest person in the United States and the 10th richest person in the world. He has joined The Giving Pledge, whereby billionaires pledge to give away at least half of their wealth.
ground_truth: George Soros