This document provides an outline for the book "Factfulness" by Hans Rosling, which argues that people have inherent cognitive biases that cause them to perceive the world inaccurately. The author was a medical doctor and public health expert who co-founded organizations like Médecins Sans Frontières. The book aims to counteract common misconceptions like thinking the world is divided into developed and developing countries, that things are always getting worse, and that urgent action is always needed immediately. It encourages readers to rely on facts and data rather than instincts and generalizations when assessing global trends.