For the first time, someone has done the due diligence of researching the facts about measuring human performance. And that someone is probably the right person to do it. Without bias or any personal agenda, history professor Jerry Z Muller provides the most comprehensive, thoroughly researched, illustrative and evidence-based argument against using metrics, KPIs or performance measures to reward, punish or "performance manage" people in any sector or industry. As a specialist in performance measurement, this book is music to my ears. Muller suggests the alternative: measure only what matters, measure it meaningfully, with buy-in, encouraging collaboration, and for the purpose of continual improvement.