This document discusses the concepts of human-centered design and design thinking. It provides examples of how design has evolved from focusing on cost and efficiency to also incorporating aesthetics, authenticity, and uniquely meeting people's needs. The document advocates an approach where designers seek to understand people and design for their practical and emotional experiences. It presents the idea that behavior is influenced by both a person's characteristics and their environment, so design can shape culture and values by influencing the environment. Throughout, it emphasizes that good design should primarily serve people.