8. Jeff Skoll (Former President of eBay)

Estimated worth: $1.8 billion 

Estimated donations: $750 million

Charity: Skoll Foundation 

Skoll has been honoured many times for his generosity. He has given the Skoll Foundation, the largest foundation for social entrepreneurship in the world, approximately $1 billion of eBay stock since its formation in 1999. The Foundation supports "social entrepreneurship" to tackle problems all around the globe. Skoll chairs the Foundation and makes grants in excess of $80 million per year.

Skoll's largest charitable donation was a $30 million contribution to the Alliance for Climate Protection Campaign.

Skoll has financed The Gandhi Project in partnership with Relief International which created a dubbed version in Arabic of the film Gandhi. They used Palestinian voice actors and artists to make the film particularly relevant to Palestinians. With Skoll's support, it is being screened throughout Palestine to promote non-violence, self-reliance, economic development, and empowerment.

In 2009, he donated $100 million to create the Skoll Urgent Threats Fund—an organization built to address worldwide complications such as water shortages, pandemics, and the Middle East conflict.