Toby Ord makes a short film for the BBCs Daily Politics show to explain why he thinks we should consider giving 10% of our income to good causes.
His call comes as the Conservatives look at ways of encouraging people to give more money to charity - part of their 'Big Society' message where people volunteer time and money to help others. Each week, the Daily Politics offers a platform to a famous person to make a film with their views on a subject before debating them in the studio.
Watch the film here http://www.bbc.co.uk/news/uk-politics-11948231
See Toby Ord's charity Giving What We Can for more information.