Giving What We Can is a community of effective givers. We inspire people to donate significantly and as effectively as possible; creating a culture of giving more, and more effectively. For those of us living in the developed world, our comparative wealth gives us an amazing opportunity to make a real difference. That is why our members take a Pledge, committing them to donate at least 10% of their income to organisations that can most effectively use it to improve the lives of others. We have over 5,000 members, who have together pledged $1.8 billion. It is critical that we donate to the most effective charities, so that it will have the greatest impact possible. It turns out that the difference between charities is astounding: Some do 1,000 times as much good with their donations as others!