We might donate to charity, buy ethically-sourced products, and try to cut down on our carbon emissions, but how do we know if we're really helping? In a world beset by crisis after crisis, it's easy to feel cynical and powerless to change anything.

Confronting this problem, William MacAskill helped develop a concept which went on to become a global movement: 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. Doing Good Better is an essential guide which shows how, through simple actions, you can improve thousands of lives - including your own.