Our world is awash with data. But as anyone who has ever opened a crowded spreadsheet knows, numbers aren't enough. We need models to understand what data mean. In The Model Thinker, Scott E. Page offers the answer: many-model thinking. By applying multiple diverse frameworks, we can achieve greater insights than by applying only one; indeed, using many models enables us to "scale a hierarchy from data through information and knowledge to wisdom. Page teaches us how and when to apply twenty-five broad classes of models-including random walks, entropy, and Markov chains-in a user-friendly and highly readable way. Culminating in an examination of how to use the multi-model approach to understand COVID-19, the opioid epidemic, and entrenched inequality, The Model Thinker provides a toolkit for business people, students, scientists, pollsters, and bloggers to make them better, clearer thinkers on the biggest issues they face. Book jacket.