What's a good company? Environmental, Social and Governance (ESG) investing is transforming the world of business and finance. Investors are using data on issues like climate and diversity to enhance returns and make an impact. But with scepticism creeping in, how far can we trust the numbers? Is all this data making a difference to people and planet, and have we actually lost sight of what we are measuring and why? Measuring Good Business explains what we can measure ? and calls for honesty about what we can't.