Pinker's seminal research explores the workings of language and its connections to cognition, perception, social relationships, child development, human evolution, and theories of human nature. This eclectic collection spans Pinker's thirty-year career, exploring his favorite themes in greater depth and scientific detail. It includes thirteen of Pinker's classic articles, ranging over topics such as language development in children, mental imagery, the recognition of shapes, the computational architecture of the mind, the meaning and uses of verbs, the evolution of language and cognition, the nature-nurture debate, and the logic of innuendo and euphemism. Each outlines a major theory or takes up an argument with another prominent scholar, such as Stephen Jay Gould, Noam Chomsky, or Richard Dawkins.

Words, Thoughts, and Theories articulates and defends the "theory theory" of cognitive and semantic development, the idea that infants and young children, like scientists, learn about the world by forming and revising theories, a view of the origins of knowledge and meaning that has broad implications for cognitive science. Gopnik and Meltzoff interweave philosophical arguments and empirical data from their own and other's research. Both the philosophy and the psychology, the arguments and the data, address the same fundamental epistemological question: How do we come to understand the world around us? Recently, the theory theory has led to much interesting research. However, this is the first book to look at the theory in extensive detail and to systematically contrast it with other theories. It is also the first to apply the theory to infancy and early childhood, to use the theory to provide a framework for understanding semantic development, and to demonstrate that language acquisition influences theory change in children.The authors show that children just beginning to talk are engaged in profound restructurings of several domains of knowledge. These restructurings are similar to theory changes in science, and they influence children's early semantic development, since children's cognitive concerns shape and motivate their use of very early words. But, in addition, children pay attention to the language they hear around them and this too reshapes their cognition, and causes them to reorganize their theories.