Most of us want to make a difference. We donate to charity, buy Fairtrade coffee, or try to cut down on our carbon emissions. Rarely do we know if we're really helping, and despite our best intentions, our actions can have ineffective -- and sometimes downright harmful -- outcomes. Confronting this problem, William MacAskill developed the concept of effective altruism, a practical, data-driven approach which shows that each of us has the power to do an astonishing amount of good, given the right information. His conclusions are often surprising; by examining the charities we give to, the goods we buy and the careers we pursue, Doing Good Better is a fascinating and original guide which shows how, through simple actions, you can improve thousands of lives -- including your own.