This sort of development is hardly new. It has many grand historical precedents. Physics, for instance, came about as a result of the collaborative conjoining of the techniques of what was then called “natural philosophy” with mathematics, along with various other disciplines. Psychology came about as a result of the collaborative conjoining of what was then called “introspective philosophy” with biology and various other disciplines. Computer science emerged from logic, mathematics, automata theory, and engineering. There are many more such examples. In each case the emerging ﬁeld required an integration of knowledge and methods under the rubric of one coherent and uniﬁed book. This is what Cognitive Science: An Introduction to Mind and Brain is designed to be.